Redline Editorial Services Sent a $1,000 Invoice to a Customer

Redline Editorial Services sent a $1,000 invoice to a customer for copyediting a booklet.According to the terms of the invoice,the customer would receive a 3 percent discount on the invoice price if the invoice was paid within 15 days.This is an example of a:

A) quantity discount
B) cash discount
C) rebate
D) functional discount
E) promotional allowance