Hi Ron, I find your responses to SC problems very useful. I eliminated options C,D,E in this problem because it does not have subject-verb agreement C. a substance that promotes blood clotting, but does not seriously interfere D. which is a substance to promote blood clotting, but does not seriously...

I have realized my mistake. Does is the verb in the choices C,D. C.a substance that promotes blood clotting, but does not seriously interfere D. which is a substance to promote blood clotting, but does not seriously interfere Option E does not have verb in the second clause so can be eliminated.Am i...

Hi, I eliminated answer choice B because i thought second clause did not have a subject. Explanation from the problem: "Since the pronoun it, referring to the trail, is the subject of the first clause, it is also by default the subject of the second; thus no subject is needed between yet and is...