Which statement best explains why tension grr between european leaders over colonialism in africa

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.

is there answer chooses?

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.