Answer:
E. product bundle
Step-by-step explanation:
Product bundling is pricing strategy adopted by companies to sell complementary products of services instead of individuals e.g a toothpaste and an attached toothbrush. This drives the demand for both of these products hence increasing revenues. In this case, a haircut and a conditioning treatment are complementary services. Offering them as a package under one price is known as bundle pricing making choice E correct.