Which of the Following Was a Characteristic of the Sales

Which of the following was a characteristic of the sales and marketing eras?

A) By the first decade of the 20^th century,production had resulted in spectacular increases in the amount of goods and services that were available.
B) During the sales era,much emphasis was placed on market research to find out what customers wanted.
C) During the marketing era,it was assumed that business profits and business success depended on hiring the right salespeople and advertising heavily.
D) During the sales era,business firms produced what they were good at producing,rather than what consumers wanted.
E) None of these statements are accurate.