The Sales Function Is Different from the Selling Process for Which

The sales function is different from the selling process for which reason?

A) The selling process is theoretical but the sales function is empirical.
B) The selling process is performed by sellers but the sales function is performed by buyers.
C) The sales function can only be carried out by salespeople,but the selling process refers to many methods of selling.
D) The sales function refers to many methods of selling,but the selling process is carried out by salespeople.
E) The sales function relies on metrics while the selling process relies on forecasts.