Josiah SC help

[shyamprasadrao]

Josiah saw <where the cost of doing business was escalating at an exceedingly alarming rate.>

A) where the cost of doing business was escalating at an exceedingly alarming rate
B) that the cost of doing business was increasing at a very rapid rate
C) where the cost of doing business was escalating at a very alarming rate
D) where the cost of doing business was increasing at a very rapid rate that
E) the cost of doing business was escalating at an exceedingly alarming rate

OA

SPOILER: B

whats wrong with C ???

[madhur_ahuja]

Please post in Sentence correction forum:
GMAT Sentence Correction - TestMagic Forums