In what way did theodore roosevelt greatly influence america's change from isolationism?

a. the united states became allies with japan in the russo-japanese war.

b. roosevelt made tremendous improvements of forest conservation in the united states.

c. he participated in world-wide events, like the panama canal and international peace settlements.

d. he was the leader when the united states was an industrial and agricultural success.

C. He participated in world-wide events, like the Panama Canal and international peace settlements.

Theodore Roosevelt's term was characterized for breaking American traditional isolationist policy.

In 1904, the President enacted the Roosevelt Corollary in which America declared itself as an international police power to guarantee that Latin Americans countries met their international obligations toward European countries and in which the U.S would intervene and protect them in case that Europeans pressed their claims directly.

In 1903, Roosevelt helped Panama secede from Colombia, which later made the U.S. easier to make an agreement with Panama to begin the construction of the Panama Canal in 1904.

He also intervened in the Russo-Japanese War (1904–05) as a mediator to achieve negotiations and end the war. In 1906, he won the Nobel Prize for Peace for such accomplishment.

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.