— Where have you been?

— I         in the heavy traffic. Otherwise I         here earlier.[ ]

A. got stuck; would have come

B. got stuck; was

C. have got stuck; would have come

D. Had got stuck; would come

以下同期并列条件说法正确的是（）

A、并列开关两侧的电压相等

B、并列开关两侧电源的频率完全相同

C、并列开关两侧电压的相位角相同

D、并列开关两侧的相序相同