How did mongolia's geographical location contribute to genghis khan's success? a. it lies in the southern part of the continent with access to the middle east. b. it lies near the middle east with land routes to asia and europe. c. it lies in the middle of the continent with access to most of asia. d. it lies near the pacific ocean with sea routes to asia and europe.

well to answer ur question to be completly honest

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."