问题详情

A Some people will do just about anything to save money. And I am one of them. Take my family’s last vacation. It was my six-year-old son’s winter break form. school, and we were heading home from Fort Lauderdale after a weeklong trip. The flight was overbooked, and Delta, the airline, offered us $400 per person in credits to give up our seats and leave the next day. I had meetings in New York，So I had to get back. But that didnt mean my husband and my son couldnt stay. I took my nine-month-old and took off for home. The next day, my husband and son were offered more credits to take an even later flight. Yes, I encouraged—okay, ordered—them to wait it out at the airport, to "earn" more Delta Dollars. Our total take: $1,600. Not bad, huh？ Now some people may think Im a bad mother and not such a great wife either. But as a big-time bargain hunter, I know the value of a dollar. And these days, a good deal is something few of us can afford to pass up. Ive made living looking for the best deals and exposing (揭露) the worst tricks. I have been the consumer reporter of NBCs Today show for over a decade. I have written a couple of books including one titled Tricks of the Trade: A Consumer Survival Guide. And I really do what I believe in. I tell you this because there is no shame in getting your money’s worth. I’m also tightfisted when it comes to shoes, clothes for my children, and expensive restaurants. But I wouldnt hesitate to spend on a good haircut. It keeps its shape longer, and its the first thing people notice. And I will also spend on a classic piece of furniture. Quality lasts. 回答下列各题： 56. Why did Delta give the authors family credits？
A.They took a later flight.
B.They had early bookings.
C.Their flight had been delayed.
D.Their flight had been cancelled.请帮忙给出正确答案和分析，谢谢！