Jayden Is Trying to Teach His Dog Some Tricks

Multiple Choice

Jayden is trying to teach his dog some tricks. So he gives him a doggie treat if he rolls over 2 times. Then he gives him another treat if he rolls after once. Next, he gives the dog a treat if he performs the roll over behaviour 3 times. Jayden is using a(n)

A) FR 2 schedule
B) VR 2 schedule
C) FI 2 schedule
D) VI 2 schedule
E) FI 6 schedule