With no explanation, chose the best option from "A" or "B". Harold visits the home of his friend Pam when her dog runs through the front door excitedly and licks Harold's hand. Harold wants to respond to the dog's kind gesture.

A: Harold quickly gets on his knees and licks the dogs head as a reciprocal gesture to show the dog gratitude.
B: Harold playfully pets the dog's head and begins to talk to the dog in a cute voice.
B.