单选题 What does the author mean by the statement "Although price wars do occur, in which all companies offer substantial savings to customers, a somewhat similar tendency to raise prices simultaneously is also usual"?

A、 It is not unusual for all companies to increase prices at the same time.
B、 It is common for companies to compete for customers by lowering prices.
C、 Customers may lose money when companies have price wars.
D、 Prices are lower during price wars, but they are usually higher afterwar

【正确答案】 A

【答案解析】作者的意思是，虽然也会出现顾客受益的价格战，但所有的公司联合起来提高价格也是很常见的。