During the Oil Crisis in 1979,following the Oil Crisis of 1971

During the oil crisis in 1979,following the oil crisis of 1971 when the price of oil quadrupled,the Organization of Petroleum Exporting Countries increased the price of oil by ______.

A) 2 times
B) 2.5 times
C) 3 times
D) 4 times
E) 5 times