What phrase did o sullivan use to describe the drive to expand, and what did he mean?

"Manifest destiny" was the term that John O'Sullivan coined in the mid- 1800's, which epitomizes the idea of driving to expand. What he meant was that the United States was destined by God himself to expand from the Atlantic Ocean all the way to the Pacific, spreading democracy and implementing capitalism in every corner of the continent, bending the will of whoever got in the way if necessary.

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to contain the wave of communism

answer; /// i believe that the correct answer is (b)///they gained vast amounts of