Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions
How lucky! You called me, because I tried to call you a few minutes ago and got a busy signal.
A.You luckily called me, so I didn’t have to call you for a few minutes because the signal was busy.
B.I was not lucky enough to call you a few minutes ago because I was busy.
C.Luckily, you called me in time, for I failed to call you a few minutes ago.
D.The busy signal prevented me from calling you a few minutes ago, so please call me back.