Changing Value Propositions in Today's Economy-Such as Changes Caused by the Growth

Changing value propositions in today's economy-such as changes caused by the growth in e-commerce-have forced marketers to learn a tough lesson about customers. What is that lesson?

A) Customers will always seek the best value regardless of quality.
B) Customers will always turn to the most recognized brand.
C) Customers would rather perform service for themselves to save money.
D) Customers will turn to the most convenient, least expensive alternative in situations where they see goods and services as commodities.
E) Customers will always seek the best quality regardless of price.