Which scenario exemplifies the production function of the value chain?

Multiple Choice

a) Reuben designs and executes an advertising campaign for his firms new product.

b) Dorie is training new employees on the use of the companys new accounting system.

c) Manuela, a customer service rep, is processing a return for an unhappy customer.

d) Sally, a loan officer at Commercial bank, originates a home equity loan for a customer.