imo D

question basically asks is \((a − b)^c\) positive?

1)b<a means (a-b) is positive

=> positive number to the power of c (irrespective of sign of c) is positive

example: \(2^(-2)\) = 0.25

S, \((a − b)^c\) is positive

sufficient

2) c = even

(a − b)^c [/m] is positive irrespective of the sign of (a-b)

example: \(-3^(-2)\)= 9

sufficient

--D--

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