Brian has a history of drinking heavily before going to bed. his family accuses him of kicking the dog, breaking several dishes, and being verbally abusive on several occasions. brown recalls none of these incidents and soon begins to forget personal information as well. brown's memory loss is most likely related to

his drinking habit

Explanation: Brian has a history of drinking heavily before going to bed. when Brian wakes up he doesn't remember anything that happened the night before possibly related to his hangover.

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."

i think it's the cabinet