Situation: The woman could not answer the mobile phone when the man called her.
M: I called your mobile phone this morning, but you didn.t answer it.
W: __________.

选择一项：
A. I was driving to the airport to meet a friend 解析：男士打女士手机没接，女士解释原因最合理的回答是：当时她正开车去机场接朋友。
B. The phone was ringing.
C. I could see the phone.
D. The phone was expensive.