Hi, I really struggle to see why (A) doesn't weaken the first sentence in the stimulus "Tenants who do not have to pay their own electricity bills do not have a financial incentive to conserve electricity."
In terms of (E), how do we know that "the biggest decreases in family income" were occurred within the period from 1996 to 2004? Because of this trouble, I picked E under the concept that I can' ...
I still don't understand why "the only" in answer choice B is valid. My original prephrase was "vote for L or N -> unacceptable." B says: unacceptable -> vote for L and N. It seems that B is the exact reversal of my prephrase.