Which of the following statement about the end of the Cold War is NOT true?

A. the Soviet leader Mikhail Gorbachev adopted a hardline foreign policy toward the West, which backfired and caused the downfall of the Soviet Union
B. President Reagan’s tough foreign policy increased the economic burden of the Soviet Union, which contributed to the latter’s bankruptcy
C. The Sino-Soviet split gave America a chance to create the so-
called triangular diplomacy which helped to end the Cold War
D. the attraction of higher living standard in the West caused many people living with the Soviet Union to resent their communist regime