I'm not crazy about this question--none of the answers is quite GMAT style--but it does push us to consider
if...then construction.
When an
if...then sentence represents a general rule with no uncertainty, use
IF present THEN present. When an
if...then sentence represents a particular future case with no uncertainty, use
IF present THEN future. (For other
if...then constructions not relevant to this question, see the
Manhattan GMAT Sentence Correction Strategy Guide, page 112-113)
For this sentence, I'd incline toward
IF present THEN future, because this sentence seems to be about a particular case. I might accept
IF present THEN present if all the
IF present THEN future answers have other grammatical problems. So I'll eliminate C for sure, and B tentatively.
OK, for concision I'm going to choose
compete over
be able to compete or
be in competition, so there go A and D.
That leaves E. I don't think B is terrible, but I'd have to go with E.
A small additional point:
raise their...game is too colloquial for real GMAT SC.
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