If R is between (-2) and (2)

If R is between (-2) and (2), which of the following can be the greatest?

(A) (1/R).
(B) R2.
(C) R3.
(D) R4.
(E) 32.

The best answer is A.
If we can choose any number between (-2) and (2), choose a really small number, for example
(1/100) plug it in answer (a), (1/1/100) = 100  none of the other answers can be larger.