GMAT Data Sufficiency (DS) | Re: Both a and b are positive; what is the value of a? (1) 150

Hey Bunuel and Chetan2u- I had a question here. When i was analyzing this question, i was thinking of a situation when a and b are positive integers. The trap answer in that case seems to be C. But i think, even if the question restricted the values of a and b to be integers, i think the answer would be still insufficient.(the initial question never mentioned such a restriction)

For example: x^3=3*b*b. I can think of two cases(obviously there would be more- one when we can take b as 3 and the
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