Read the following two details from the article.
1. the company's products — like virtually every bulletproof backpack on the market are
advertised as meeting "ballistic level iiia" standards, which means they can withstand
bullets from handguns and revolvers.
2. furthermore, the products - which often are tested independently by the companies selling
them - are not vetted by the national institute of justice, an arm of the justice department
that certifies body armor for law enforcement officers.
which option best explains how these details develop a central idea of the article?
(a) the details explain why the companies that sell bulletproof backpacks often test their products
independently.
(b) the details describe two methods used to determine whether bulletproof products are effective in
protecting children.
(c) the details indicate that only bulletproof backpacks that have met certain standards can be advertised
as effective
(d) the details support the idea that there is no proof that bulletproof backpacks are effective in making
children safer.

(B) The details describe two methods used to determine whether bulletproof products are effective in

protecting children.

Explanation:

They can withstand bullets from revolvers and handguns, also, they are tested independently by companies who produced them.

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.

what he !