As Contrasted with Hygiene Factors, Sales Manager Might Use Which

As contrasted with hygiene factors, sales manager might use which of the following as "motivators?"

A) increase salaries of all salespeople.
B) improve the working conditions for salespeople, i.e., upgrade their automobiles and quality of technical equipment available to them.
C) assign salespeople to new, more challenging tasks such as opening new accounts or selling new product categories.
D) provide each salesperson with a spacious office and unlimited expense account when handling company business.