Question

which statement is a correct evaluation of the evidence in the passage?
it is sound because it cites an experts opinion.
it is not valid because it uses irrelevant information
it is logical because it includes statistics and other scientific data
it is illogical because it does not connect the reader back to the claim.
water flowing from toilet to tap may be hard to swallow,
john schwartz

Explanation:

The passage cites Dr. Paul Slovic, a professor of psychology, which is an expert's opinion. This makes the evidence sound as expert opinions are a valid form of evidence in many contexts. The other options are incorrect: there is no indication of irrelevant information (so the second option is wrong), no statistics or scientific data are mentioned (so the third option is wrong), and the evidence does connect to the claim (so the fourth option is wrong).

Answer:

It is sound because it cites an expert's opinion.