Group a Rats Receive 30 Paired Buzzer-Shock Trials

Multiple Choice

Group A rats receive 30 paired buzzer-shock trials.Group B rats get the same,but also 20 more trials with shock alone (no buzzer) .You would predict that

A) Group A and B later show equal fear response to the buzzer.
B) Group B shows a stronger fear response to the buzzer.
C) Group A extinguishes fear to the buzzer more rapidly.
D) Group A shows a stronger fear response to the buzzer.