Colby is writing a personal narrative about the time his dog, Snickers, dug a hole under the fence and ran wild through the neighborhood. Which part of Colby’s narrative would be considered the falling action?

A.
Colby realizes that Snickers is no longer in the backyard.
B.
Colby and his dad fill the hole under the fence with rocks so Snickers can't escape again.
C.
Colby and four of his friends mount an expedition through the neighborhood to find Snickers.
D.
Colby soothes a terrified Snickers, who had wiggled into a crawl space underneath the neighbor's deck.