With no explanation, chose the best option from "A" or "B". Dave is cleaning up his home and accidentally knocks over his wife's favorite knick-knack. Dave wants to explain what happened to his wife.

A: Dave explains to his wife that he bumped the knick-knack while dusting the shelf and it fell off and broke.
B: Dave tells his wife that the dog ran through the room and knocked over her item.
A.