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ashforgmat
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We have 1) mv < pv
2) mv < 0
3) pv <0
mv < pv implies (m-p)v < 0
which means either (m-p) > 0 and v < 0 or (m-p)< 0 and v > 0
which means either m> p and v<0 or m<p and v>0. From here we have a. alone is sufficient since a. says that m<p. The answer is v>0
mv < 0 implies that either m>0 and v<0 or m<0 and v>0. From here we have b. alone is sufficient since b. says that m<0. The answer is v>0.
The correct answer is (D).
