Can someone explain this difference?

Test Preparation SAT Preparation
1

<p>[Moving on to other topics, the dispute was abandoned by the editors] in order to accomplish a greater amount of work at the meeting. </p>

<p>(B) By moving on to other topics, the editors abandoned the dispute. </p>

<p>(E) Moving on to other topics, the editors abandoned the dispute. </p>

<p>I narrowed to (B) and (E), but I still don't know why (B) is incorrect. Why putting 'by' in front of the sentence changes the meaning? </p>

<p>thanks!</p>

2

<p>The “by” is unnecessary. The SAT asks tons of questions like this.</p>

<p>Examples: </p>

<p>Swimming through the water, the fish…
Typing the last page of his book, the author…</p>

<p>It always starts with an -ing word and the second part of the sentece agrees with the subject</p>

3

<p>Hmm it really is a tricky question</p>