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?
a) to argue that we kill too many beneficial bacteria
b) to create concern about the water supply
c) to introduce a new topic that needs scientific study
d) to suggest the new science of microbes may affect many things

The answer is C

Explanation:

I took the test and A is incorrect and so the only other logical answer would be C.

did you ever get an answer? i'm on the same question : (

you can change by someone having a negative opinon of you in many ways for example thi can lead to depression and taking of ones life also known as sucide this effects there self esteem and ego in a negative way making them feel sad depressed and stressed causing them to act gloomy and sad if this continuses this can lead to self harm or much worse things.

hope i .