Which problem could be solved with the expression 3*(6+4)

a - edward mowed 3 lawns in the morning and 6 lawns in the afternoon. he did this for 4 days. how many lawns did he mow?
b - danielle had 6 dolls. she bought 4 additional dolls. she then went to the thrift store and tripled her collection. how many dolls does she have now?

c - barry ate 3 cookies on monday. he then ate 6 cookies on tuesday. on friday he ate 4 cookies. he follows this pattern for 4 weeks. how many cookies did he eat?

a edward's problem
b danielle's problem
c barry's problem