CBC is a famous air company which has over twenty planes carrying passengers and goods, flying along 12 fixed lines all over the world. Its service is very good but some passengers are still not satisfied with it and that is why in 2008 and 2009 the company received letters of complaints from consumers or passengers who pointed out over a dozen kinds of problems which are divided in groups in the following table. Those about passengers’ things carried by the plane are Baggage problems. Consumer service refers to service work which passengers are not satisfied with. Over sales of seats are about the fact that more seats are sold and as a result the plane is too crowded to be safe. Refund（退票）problems appear when passengers fail to receive the money paid back to them because of what they have lost. Fares are problems about the price of tickets.
Consumer Complaints Received by the CBC

Category	2008	2009
Flight problems	20.2%	22.1%
Baggage	18.3%	21.8%
Customer service	3.1%	11.3%
Over sales of seats	10.5%	11.8%
Refund problems	10.1%	8.1%
Fares	6.4%	6.0%
Reservation & Ticketing	5.8%	5.6%
Tours	3.3%	2.3%
Smoking	3.2%	2.9%
Advertising	1.2%	1.01%
Credit	1.0%	0.8%
Special passengers	0.9%	0.9%
Others	6.0%	5.3%
Total Number of Complaints	2,998	1,792

By about what percent did the total number of complaints decrease from 2008 to 2009?

A．40%

B．60%

C．75%

D．100%

If the circle graphs below show total consumer complaints for 2008, which graph shows a dark part that is about Flight problems and Refund problems together?

A．

B．

C．

D．

From the passage we can know that _____.

A．customers are not satisfied with CBC

B．sometimes CBC sells more tickets than its plane’s most desirable seats

C．CBC has more than twenty planes which fly to all the capital cities of the world

D．customers can only buy tickets with ready money