丁丁倒数 77#

s_dUSA

This is a sufficient assumption question, which means if the new assumption is added, the argument must be absolutely right, and only D can do this, D makes this argument absolutely right.

C should be kicked out immediately, because it has "some", normally only correct in necessary assumption questions.

A is wrong, because it cannot quarantee the righteousness of this argument either.

s_dUSA

love what you did, posted so many amazing questions, I am doing on it right now, it's boring and tough.

I would love to post some too, but since I am doing some very new preptest, I am afraid that posting those questions will ruin your plan.

s_dUSA

you are right, I didn't see that!