Why was the Cuban missile crisis significant? A. Cuba threatened to invade the United States.
B. It came close to starting a full-scale nuclear war.
C. The United States almost fell under communist rule.
D. It promoted nuclear research in the Soviet Union.

im pretty sure its A

Explanation:

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !

answer; /// the above statement is (true);