All of These Are True About Coupons Except Which

All of these are true about coupons except which?

A) The majority of coupons are distributed as freestanding inserts in newspapers.
B) Most coupons are now issued without an expiration date.
C) Coupon usage among consumers is now fairly steady and quite popular.
D) The online coupon redemption rate is higher than for paper coupons.
E) Coupons generated at Internet sites and on mobile phones make up a very small proportion of all coupons.