Hua Knows That Lee Frequently Completes Her Assignments Long After

Hua knows that Lee frequently completes her assignments long after they are due.She has noticed that their teacher willingly accepts Lee's late assignments because Lee always has a creative excuse for turning them in late.Hua begins to do the same thing-she turns in assignments past the due date and makes up excuses for why she is late.Hua's increase in excuse-making is due to:

A) shaping and intrinsic reinforcement.
B) an increase in self-reinforcement.
C) a decrease in self-regulation.
D) modelling and vicarious reinforcement.