Which country did Germany try to instigate, into invading America

mperial German plans for the invasion of the United States. Imperial German plans for the invasion of the United States were ordered by Germany's Kaiser Wilhelm II from 1897 to 1903. He intended not to conquer the US but only to reduce the country's influence.

Explanation:

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d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."