The USA Patriot Act has significantly altered the limits of Select one: a. law enforcement to conduct searches. b. the good faith exception. c. police overtime. d. interrogations and confessions.

a. Law enforcement conduct searches

Explanation:

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."