Lisa Campos was interested in buying a coffee pot to use at college and a cassette player for her sister's birthday present. At the local discount store, she compared prices on coffee pots and chose the cheapest. She read the product information on each cassette player and finally chose one with stereo headphones and a rechargeable battery. For Lisa, the coffee pot was a. a convenience product, but the cassette player was a specialty product b. a heterogeneous shopping product, but the cassette player was a staple c. an impulse product, but the cassette player was a convenience product d. a specialty product, but the cassette player was a heterogeneous shopping product e. a homogeneous shopping product, but the cassette player was a heterogeneous shopping product