I am not sure why this is the answer. How do I know if it's asking for -1.96 or +1.96? I figured out that the question is saying to find the z-score that cooresponds to the body having a proportion of...

I am not sure why this is the answer. How do I know if it's asking for -1.96 or +1.96?

I figured out that the question is saying to find the z-score that cooresponds to the body having a proportion of .9750 and tail of .0250 but I just don't understand how to differentiate the rest.

Extracted text: Which z-score mark separates the bottom 97.5% from the top 2.5% in a normal distribution? а. - 1.96 b. -1 с. 1 d. 1.96