InfoTech's New Product Team Has a Norm of Backing Up

Multiple Choice

InfoTech's new product team has a norm of backing up each of their computer's hard drives at the end of each working day. This norm developed because one day a computer virus infected the team's computer network and destroyed many important computer files. The cause of this norm was clearly:

A) an explicit statement.
B) carryover behaviors.
C) primacy.
D) a critical event.
E) none of these.