Sentence Correction

Despite Japan's relative isolation from world trade at the time, the prolonged peace during the Tokugawa shogunate produced an almost explosive expansion commence.

A) Japan's relative isolation from world trade at the time, the prolonged peace during the Tokugawa shogunate
B) the relative isolation of japan from world trade at the time and the Tokugawa shogunate's prolonged peace, it
C) being relatively isolated from world trade at the time, the prolonged peace during Japan's Tokugawa shogunate
D) Japan's relative isolation from world trade at the time during the Tokugawa shogunate, prolonged peace
E) its relative isolation from world trade then, prolonged peace in Japan during the Tokugawa shogunate

[spoiler]OA:A[/spoiler]

[spoiler]Was left between A and D, i finally chose A) as it is the original sentence and couldn't find any error in it; but i am wondering about the errors in D)[/spoiler]

Let us look at each of the answer options -

A - correct answer. It clearly indicates what produced an explosive expansion commerce and when it was produced.

B - Shogunate's prolonged peace is inferior to Peace during the Shogunate.

Option B also changes the intended meaning.
It says this -
"Despite Tokugawa shogunate's prolonged peace, it produced an almost explosive expansion commerce". - Clearly Illogical.

C - Modifier error. "the prolonged peace" was not isolated from world trade.
Also, GMAT does not like the usage of being as a modifier.

D - "at the time during" is redundant.
It also does not answer the question - When did prolonged peace produce an almost explosive expansion commerce?

E - Modifier error. "the prolonged peace" was not isolated from world trade.