Ascientist measures the ph of some rainwater and finds that it is acidic.
which ph corresponds with the acidic quality of the rainwater?

a.6
b.7
c.8
d.9

Acids tend to have a pH of below 7 (which is neutral). 

The only option that makes the pH statement above true is A, 6. 

So the answer is with no doubt, A. 6

I think the correct answer from the choices listed above is option A. The pH that corresponds with the acidic quality of the rainwater should be the value 6. A value that is below 7 is said to be acidic while higher than 7 is a base. Hope this answers the question.