12) Among the following statements:

(i) $3^{10}$ is a cube;

(ii) $3^{10}$ is odd;

(iii) $3^{10}$ is a square;

which ones are correct?
(A) Only (i)
(B) only (ii)
(C) only (iii)
(D) (ii) and (iii)
(E) all three.