The best response so far is dhmo's, first pointing out that no such question would ever appear on the MCAT, then using process of elimination to raise the chances to 50%.

In case you want to know the answer to the very non-MCAT question asked:

Every MCAT-taker should know V=IR. Some will know, though it is not required, that V (voltage, or potential) arises as a function of E; specifically, it is the definite integral of E dx. From these two equations, we get R = V/I = (integral of E)/I. (Tracking negatives is irrelevant, here and usually -- you just use common sense at the end, and in this case common sense says we don't care because only one of them is in the answer choices.) So choice a works, and b is the answer to the original question.

But again: *Not on the MCAT! Don't worry about this sort of thing!*

Shrike

TPR lots o' stuff