The domino theory states that if one country becomes communist, its neighbors will become communist and option C is correct for completing the sentence.
<h3>What is domino theory?</h3>
The domino theory was introduced and applied on various nations after the world war II. The domino theory is also known as domino effect.
The domino effect is the effect of converting a government of from non-communist to communist government on the neighboring nation's government.
The domino effect will lead to the conversion of the neighboring government in a communist government as a result of falling of one state's government for communism.
Therefore, The domino theory states that if one country becomes communist, its neighbors will become communist and option C is correct for completing the sentence.
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