问题
单项选择题
According to basic Economics Theory, As compared with acting independently, a group of oligopolistic companies operating with perfect cooperation will most likely experience an increase in :（）
A. both output and prices.
B. neither output nor prices.
C. prices and a decrease in output.
答案
参考答案：C
解析：
As the companies agree to restrict output, market price will rise above average total cost and joint economic profits will accrue.