Which of the following illustrates generalization?

a. A rabbit that has been conditioned to blink to a tone also blinks when a similar tone is sounded.

b. A dog salivates to a tone but not to a buzzer.

c. A light is turned on repeatedly until a rat stops flexing its paw when it’s turned on.

d. A pigeon whose disk-pecking response has been extinguished is placed in a Skinner box three hours later and begins pecking the disk again.

e. A child is startled when the doorbell rings.