Tyrone Always Starts His Day with a Cup of Black

Multiple Choice

Tyrone always starts his day with a cup of black coffee. Last night, Tyrone stayed at his mother's home, and she made him a cup of coffee when he got up. Later, Tyrone was surprised to learn that the coffee was decaffeinated because he had actually felt more alert after drinking it. In this example, what are the conditioned stimulus and conditioned response?

A) The CS is the caffeine, and the CR is alertness.
B) The CS is the smell and taste of coffee, and the CR is the caffeine.
C) The CS is alertness, and the CR is the smell and taste of coffee.
D) The CS is the smell and taste of coffee, and the CR is alertness.