A sales manager has implemented a program for his salespeople that involves a meeting with each salesperson, during which the sales manager gives the salesperson the yearly quota for the salesperson's territory. The sales manager has missed the key concept in management by objectives, which is

a$.$ a mutual understanding of the punishment to be given if the salesperson does not meet the goal set by the sales manager.

b$.$ reducing the paperwork involved in the MBO process.

c$.$ mutual goal setting between the sales manager and the salesperson.

d$.$ ensuring that the economy can support the sales quota assigned.

e$.$ documentation of the sales quota in the salesperson's personnel file.