Trade (Functional)discounts Are Calculated on Two Criteria

Trade (functional) discounts are calculated on two criteria.What are the two criteria?

A) Discounts based on paying cash; the marketing activities the reseller performs.
B) When the reseller joins the channel; the marketing activities the reseller performs immediately.
C) When the reseller joins the channel; the marketing activities the reseller performs in the future.
D) Where the reseller is in the channel; the marketing activities the reseller performs in the future.