An Appropriate Symbol of Détente Between Russia and America Was

An appropriate symbol of détente between Russia and America was the ABM Treaty of 1972 that

A) guaranteed massive American financial aid to the Russians.
B) allowed the Russians to export more luxury commodities to the U.S.without paying import taxes.
C) enabled both countries to trade freely in aircraft, bonds, and minerals.
D) pledged the two nations to limit their development of anti-ballistic missile systems, thus avoiding a new arms race.
E) resulted in alliance between the Soviets and the United States directed against Communist China and Mao Zedong, with the letters ABM referring to "All But Mao."