Sentence Correction (SC) | Re: The globalization of financial-services companies has been a

Solution 1

Any time an underlined portion begins with a preposition - especially if some answer choices contain a preposition and some do not - it's likely that the GMAT is testing IDIOMS.

In option B, ‘because of allowing the transfer’ is unidiomatic.
‘because of’ must be followed by a noun.
The command subjunctive applies only when there is some ‘bossiness’ involved. ‘allow’ is clearly not bossy and we don’t need a bossy word here. Therefore, ‘allows that’ doesn’t
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