Q15

[gethornburg]

#15 ...

i suggest that the key is recognizing that S9 removes P and G removes w. The inference is two of the three remaining subjects, R,M and J must be selected. Here the chain of M > ~J > R is crucial because the contrapositive inference ~R > ~M provides the correct inference.

[ManhattanPrepLSAT1]

Here's my run through for this question!

[shingctse]

I am having difficulties with understanding why B.) Macroeconomics would not be a viable answer as well.

Based on the rules, the only options left are Macroeconomics, Japanese, and Russian. Yes, M and J cannot go together, so B must be it.

However, J and R cannot go together, meaning she would have to take Macroeconomics.

So I feel that B.) Macro and D.) Russian are equally correct. Can someone explain to me why they aren't?

--EDIT--

Found out why I wasn't getting the right answer. I made a false inference, thinking J and R couldn't go together. Right. Thanks!