Sentence Correction

I found this qn in the Manhattan material.... Unfortunately didnt have the answer...

Career switchers often schedule interviews with high-level managers, believing that the insight of the professionals will help narrow dosn many choices of careers availabel to greduating MBA's.

a) Same as above
B) Career Switchers, beliveing that the insight of professionals will help narrow down the many choices of careers avialable to graduating MBAs, often schedule interviews with high level managers
c) career switchers believind that scheduling interviews with the insight of high level prossional managers will help narrow down the many choices of careers availbale to graduating MBAS.
d)career switchers, believing that interviews with high level managers whose insight will help narrow down the many choices of careers available to hraduating MBAs, often schedule them
e) Career switchers often schedule intervies to narrow down the many choices of careers availableto graducating MBAs, believing that the insight of professionals with high level managers will help them

For me the answer looks like B. Pool in your answers for this along with reasons.

Thanks. [/u]