the main problem i see with choice (c) is "if used as substitutions for..." this implies that the fertilizers themselves are "substitutions". that doesn't make sense; a "substitution" is actually the process of substituting one thing for another, not one of the things themselves. Hi experts, I'm...

I think C can be eliminated on the basis that it mentions " they may accelerate soil structure deterioration and soil erosion" but they==fertilizers cannot do the action. meaning is that " their substitution may accelerate soil structure deterioration and soil erosion. " am i co...

In Manhattan Guide SC p72, experts say " Every it and its must refer to the same singular antecedent. Every they, them and their must refer to the same plural antecedent. These specific rules are respected on Sentence Correction." But in OG13 sentence correction, the correct answer for #85...

Which one is correct? 1. "one goal of semiconductor research is to develop a silicon chip that can transmit and receive light signals directly, a development that may one day lead to" 2. "one goal of semiconductor research is to develop a silicon chip that can transmit and receive li...