Which of the following groups are cyclic?\\
(A) $\mathbb { Z } / 2 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$\\
(B) $\mathbb { Z } / 3 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$\\
(C) Every group of order 18.\\
(D) $\left( \mathbb { Q } ^ { \times } , \cdot \right)$