Which of the Following Statements About Product Knowledge Is True

Which of the following statements about product knowledge is true?

A) Knowledge of one's product or service is not important in all areas of professional selling.
B) Research conducted by Whirlpool Corp.indicates that product knowledge received the least attention by firms in the study.
C) Complexity and variety of products available and the increasing number of new products complicate the buying process.
D) Respondents to a Learning International study felt that training should stress company history over any other area.
E) Rutger's Group believes that all employee's should be able to pass a test on product knowledge before interfacing with the customer.