Which policy establishes the right of the united states to act as a policeman in the western hemisphere? , a. the roosevelt corollary, b. the open door policy, c. the gentlemen’s agreement, d. the big stick policy.

I think it is a. the Roosvelt Corollary.

Explanation:

The Roosvelt Corollary stated that the United States could intervene or use military force to keep force in Latin American countries where it is necessary.

answer: this is because archeologists keep finding artefacts and ancient ruins dated more than 10000 to 15000 years, date around scientists said humans discovered language; which is at least mysterious as scientists always have said that is necessary to have a language to have architecture and some basic maths.

explanation: brainlest