Question

Marion will receive a promotion and a raise if she completes a difficult assignment. this is an example of

Answer 1

I would say this is an example of  the incentive of an award is used to encourage her to do her very best to complete the difficult assignment and will help her to overcome the difficulties and successfully finish the assigned work.

Answer 2

A test, where the potential reward of a promotion will motivate the employee to perform to their best ability, and allow the employer to see her perform under pressure