In 1949,the North Atlantic Treaty Organization

In 1949,the North Atlantic Treaty Organization

A) was created in response to the Soviet Union's Warsaw Pact.
B) called for a de-militarized zone across Western Europe.
C) both was created in response to the Soviet Union's Warsaw Pact, and declared that an attack on one member nation was an attack on all.
D) All these answers are correct.
E) declared that an attack on one member nation was an attack on all.