B: Both nature and nurture are important
Answer:
The answer is c. spontaneous recovery.
Explanation:
In classical and operant conditioning, spontaneous recovery refers to the sudden reapparition of the response to a stimulus, even when it was believed to be extinct. Spontaneous recovery usually occurs after a period in which the conditioned stimulus was <u>not</u> present, as in the example.
This phenomenon is important to understand that an extinct behaviour is <u>not</u> the same as an unlearned behaviour.
Silk went westward, and wools, gold, and silver went east. China also received Nestorian Christianity and Buddhism (from India) via the Silk Road.