What nation's progress has heavily influenced Southeast Asia?
A. Russia
B. Japan
C. India
D. China

Southeast Asia was heavily influenced by European colonialism.

Explanation:

The only area of the region that was not colonized by the Europeans was Thailand, which was called Siam during the colonial era. It remained an independent kingdom throughout the colonial period and was a buffer state between French and British colonizers.

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a system of cooperative federalism emerged, as the powers of the federal government expanded.

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