What did han emperors do to keep the economy stable? plz me !

a.
stopped merchants from selling goods along the silk road

b.
bought grain, stored it, and resold it during times of low harvest

c.
introduced the first standardized coins

d.
refused to allow monopolies in any industries

Einar sees alexandra every day across the room in his history class but has never talked with her. einar likes the way alexandra looks, including the way she dresses and how she wears her hair. he's even more attracted to her apparent intelligence and the way she handles herself in class discussions and during interactions with the instructor. he'd like to know more about her, so he asks one of his friends about her. einar, using a passive strategy to gain information about her, is probably in the preinteraction awareness stage of any relationship that might develop between them. t/f