GMAT Sentence Correction (SC) | Re: Many were in agreement to boycott the department store,

C. Agreeing to boycott the department store, many even wrote emails in protest to the vice-president of the chain imploring him to take action against the unsavory hiring practices.

Hey Guys, dont you think that comma is missing before imploring in option C.without comma ing modifier modifies the preceding noun that is the chain in this case.

I selected D, because D is grammatically correct and subtle change in placement of "in protest" near to modifier "in which" looks