Personal Selling Often Results in Conflicts Between Sales Force and Management.Which

Personal selling often results in conflicts between sales force and management.Which of the following is the major reason for these conflicts?

A) The conversion ratio of personal selling could be extremely low.
B) Sales force and marketing may not be working as a team.
C) Most organizations do not distinguish sales and marketing departments.
D) Sales people do not deliver personalized messages to customers.
E) Sales is a line function in organizations whereas marketing is a staff function.