Which best supports the claim that the argument in the last three sentences of section one is valid? a) it is possible for both its premises to be true and its conclusion to be false. b) the premise can be determined to be true and the conclusion follows that premise. c) some support for the valid conclusion must exist to demonstrate its truth. d) this argument is valid because it leads to its own conclusion.

The correct answer is option "B": The argument is valid if the premise can be determined to be true and the conclusion follows that premise.  

For a valid argument, the conclusion must logically follow from the premises. According to a deductively valid argument, if the premises about the argument are true, its conclusions must be also true; since there is no possiblity that the conclusions are false with true premises. Besides, false premises are followed by false conclusions. However, false premises can have true conclusions. But a true premise cannot have a false conclusion.

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.

jefferson introduced the idea that one does not change a government for "light" causes because he wanted to emphasize the seriousness of colonists' reasons for declaring independence.