The 20^th Century's Age of Leftist Revolutions

The 20^th century's age of leftist revolutions

A) seems to be continuing in strength in the 21^st century.
B) is continuing with the support of Iran.
C) has gained strength as a result of China's growing power.
D) seems to have lost its steam with the collapse of Soviet bloc communism and the introduction of capitalist economic measures in China and Vietnam.
E) has moved towards increasingly radical revolts.