Ricky heard from his friends that marijuana use can cure glaucoma so it should be legal in all 50 states. ricky knows that he is biased in favor of marijuana legalization, so he decides to exercise some skepticism about this claim. he researches where his friends got their information, how reliable it is, and what other sources say about legalizing marijuana. ricky is
a. acting unconsciouslyb. hypothesizingc. theorizingd. thinking critically

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

anyone me i need

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."