<ol>
<li>For many, the game of Scrabble is no mere pastime: highly skilled players participate in tournaments every bit as intense as [competing chess masters].</li>
</ol>
<p>(A) competing chess masters
(B) those in which chess masters compete
(C) when chess masters compete
(D) they were when chess masters compete
(E) if chess masters were competing</p>
<p>Answer: B
I definitely know why c, d, and e are wrong but as for A and B I don’t have a clue. For one the correct answer B is not even parallel to “highly skilled players participate in tournaments”. Please help :(</p>
<ol>
<li>[Although raining], everyone who [had come] to the premiere of the new film [was] determined to remain in the long line [rather than] go home. [No error]</li>
</ol>
<p>Answer: Although raining
Is raining supposed to be “it was raining” or “it had been raining”?</p>
<ol>
<li>Genetic engineering of plants, which has both opponents and proponents, may help improve drought tolerance in vegetables, [a development that could increase crop yields]. </li>
</ol>
<p>(A) a development that could increase crop yields
(B) and that could help the increase of crop yields
(C) which would help for increasing crop yields
(D) helping to increase, with this development, the yields of crops
(E) as such a development would help increase the yields of crops</p>
<p>Answer: A
D and E were just so wordy that I immediately crossed them out. I’m guessing B and C have ambiguous “that” and “which”, respectively but not 100% sure. Is my reasoning correct?</p>