Which of the Following Is an Advantage of Digital Coupon

Which of the following is an advantage of digital coupon distribution?

A) Digital coupons can offer a lower coupon value because the consumer doesn't have to go to too much trouble to redeem them.
B) Digital coupons enjoy a higher redemption rate because consumers can access a coupon for a desired brand right while shopping.
C) Retailers prefer digital coupons because they don't have as much paper to manage when claiming their handling fees.
D) Technology associated with smartphones is inexpensive.