To take back or make void such as 1. corollary
a ruling or decision
a type of policy decision that
2. expansionist
increases a nation's territory or economy
ideas added to an already
established plan of action
3. rescind

The answer is below

Explanation:

Considering the available options, the correct term that matches their meanings are given below.

1. EXPANSIONIST - a type of policy decision that increases a nation's territory or economy.

2. COROLLARY - ideas added to an already established plan of action.

3. RESCIND - to take back or make voids such as a ruling or decision

Explanation:

the answer is a. for apex ur welcome

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.