请教两道语法题???

jjyyww11

1) Mexican (jumping beans) are (actually) seeds (in which) contain moth larvae (whose) activity causes the seeds to "jump."
答案:C, 我认为B也不对.
2) Jazz first (flourished) in New Orleans, Louisiana, and (then) spread (at) cities all (across) the country.

答案:C, 认为D也错了,应改为over

jjyyww11

3x a lot!!!