Jane has a dog named Marla. Marla typically barks when the family sits down to eat dinner. Jane discovered if she dropped frozen peas to Marla while she was in a down position by her feet, she would be quiet during the meal. It's been months and Jane automatically gets peas out every time she wants to eat dinner. She drops them frequently and they have a peaceful meal.

Marla learned to lay quietly at the dinner table through positive reinforcement. What learning happened to Jane that makes her continue to get peas out at every meal?

A. Positive Reinforcement
B. Positive Punishment
C. Negative Reinforcement
D. Negative Punishment