Which sentence uses active voice?

a. the strange woman carried a red box.
b. the young man was offered assistance.
c. the cousins were mistaken for each other.
d. the tourists were solicited by merchants.

Pls i give ! i will give you 50 points no ! its a essay by the way so pls do it well at the beginning of the story, alicia is convinced that scallops will hurt her. why then does she claim at the end of the story that she was going to have "a good day"?