Which form of learning—classical conditioning, instrumental conditioning, observational learning, or cognitive learning—best explains the following consumption behaviors:

(a) Buying a six-pack of Gatorade,

(b) Preferring to purchase jeans at a Diesel Store,

(c) Buying an e-reader for the first time,

(d) Buying a new car

(e) Switching from one cell phone service to another? Explain your choices.