read this sentence from the main text:

all of this new information should make us think twice about things like antibacterial soap, which gets into our water supply.

what purpose does this sentence serve in the closing paragraph?

to argue that we kill too many beneficial bacteria

to create concern about the water supply

to introduce a new topic that needs scientific study

to suggest the new science of microbes may affect many things

“third, all reviewers have a bias – no matter how impartial they try to be, opinions on movies are just that: opinions. this isn’t necessarily a bad thing: if you read a review by a critic that you know prefers foreign films, you know how seriously you should take his scathing critique of ironman.” according to this passage, all reviewers a. prefer foreign films c. have bias b. hated the movie ironman d. refuse to watch popular films