I'll give you a question, please answer with step-by-step reasoning process.
The edge of a cube is 2a cm. Find its surface?\nOptions:\n(A) 23a2 cm2\n(B) 84a2 cm2\n(C) 64a2 cm2\n(D) 24a2 cm2\n(E) 14a2 cm2

(D)
6a2 = 6 * 2a * 2a = 24a2.

The final answer: (D)