Answer:
Option C. Conditioning.
Step-by-step explanation:
Watson believed that at the moment of birth we have 3 unlearned emotions. Fear, rage and love. And those 3 emotions are learned by the way those around us and our environment condition us to do so.
Watson stated that a baby loves as an automatic response to soft strokes, kind words, or kind expressions, the baby then learns to reply with a smile.
According to Watson, a babies don't love specific people, they are conditioned to do it.