"The words unexceptionable and unexceptional are often confused. Unexceptionable means 'beyond objection, whereas unexceptional means 'ordinary or typical.""
Based on the entry above, which sentence uses unexceptional correctly?

The jurors were impressed; they found the account of the witness to be unexceptional.

The principal's unusually high standards for student behavior were considered unexceptional

The critic said that there was nothing special about the movie; it was in every way unexceptional

To run a successful lab, the researcher's standards for safety and accuracy must be unexceptional

The correct answer is  C. The critic said that there was nothing special about the movie; it was in every way unexceptional.

Explanation:

According to the entry, the meaning of the word unexceptional is "ordinary" this means something or someone unexceptional is common or usual. This meaning is only shown in the sentence "The critic said that there was nothing special about the movie; it was in every way unexceptional" because if the critic considers the movie has nothing special this movie can be described as common, ordinary, or unexceptional, which means the word unexceptional reflects its correct meaning.

On the other hand sentences such as "The principal's unusually high standards for student behavior were considered unexceptional" reflect the meaning of the word unexceptionable because, in this case, the standards of the principle are not ordinary but they are beyond objection or cannot be criticized.

many were disgusted, nauseated and shook their heads with disapproval upon finding out about the recycling of water process. however, they do not seem to understand that this process actually saves water.

although individuals may argue that it is unhealthy, and or unsafe to drink water that is "from toilet to tap" , the water is 100% safe to drink and involves forcing the water across a membrane, which "removes   any impurities, including viruses, pharmaceuticals and dissolved minerals" , according to paul rozin, a psychology professor who studies revulsion.

i agree that that the thought of drinking water that once ran through someones kitchen sink isn't quite appealing, but recycled wastewater is safe to drink. it also saves water. "the city produces nine million gallons a day" claims russell schreiber, the city’s director of public works.

recycled waste water has absolutely no health concerns whatsoever. when wastewater goes into a system, it's absorbed back into the ground. thus, it goes into a sewer system, then goes through a treatment process that removes contaminants before being released. nonetheless, there is no problem in drinking water that has been recycled.

"in drought-ed california, there are six state agencies that use wastewater that comes from an intellectual property source," according to the university of california, riverside. studies show that this water is completely safe to drink, however, it still doesn't mean people are going to happily pour it in a water glass.

researchers hope it "may make consumers more amenable to drinking recycled wastewater," extraordinarily, women who have a higher "disgust reaction" and make most consumer purchasing decisions.