In Comparison to Line Sales Executives and Staff Trainers Within

In comparison to line sales executives and staff trainers within the company, outside training specialists are usually

A) less flexible in being able to handle a part of or the total training program
B) less knowledgeable and inspiring since their livelihood does not depend upon satisfying clients
C) able to help many smaller businesses that cannot afford to have their own sales training departments
D) all of the above are true about outside training specialists