Why,compared with a Couple of Decades Ago,has It Become Even

Multiple Choice

Why,compared with a couple of decades ago,has it become even more important to understand your customer before you try to sell to that customer?

A) Competition and diversity of product have increased in most markets.
B) More customers make buying decisions without the input of the seller.
C) Analytical tools for forming psychological pictures of customers have improved.
D) The customer base itself is more diverse.