A salesperson can influence the supply chain passively or actively. All of the following are ways a salesperson can influence the supply chain actively EXCEPT:

a$.$ The salesperson arranges for additional financing for the customer at lower rates than usual.

b$.$ The salesperson brings in product designers to modify the product for the customer.

c$.$ The salesperson arranges for custom implementation at the customer's site.

d$.$ The salesperson predicts the sales to one customer for the upcoming quarter.

e$.$ The salesperson works with the shipping department to arrange for special delivery methods for the customer.