I want to reopen this discustion of this question from gmatprep of course. D is oa.
"with+comma+main clause" modify main clause and dose not need to refer to a specific noun in the main clause. answer choice D ilustrates this point. "with phrase" in D refer to NO noun in the main clause.
//Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people// now using their mobile phones to make calls across a wide region at night and on weekends, when numerous wireless companies provide unlimited airtime for a relatively small monthly fee.
A. Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people
B. As the cost of wireless service plummeted in the last year and as mobile phones became increasingly common, many people
C. In the last year, with the cost of wireless service plummeting, and mobile phones have become increasingly common, there are many people
D. With the cost of wireless service plummeting in the last year and mobile phones becoming increasingly common, many people are
E. While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are
in most cases, "with +comma+ main clause" modifies main clause and refers to a specific noun in the main clause.
fo example:
with his hand tied, he run into the office.
in this case, "with phrase" refers to "he"
what I want to say is that there are 2 cases: "with phrase" refer to a noun in the main clause and "with phrase" refer to NO noun in the main clause.
Ron, expert, is my thinking correct?