Anthony picked up a package of paper plates and noticed that there was a coupon stuck onto the package that stated, "Save 50 cents now!" When he went to the checkout, the cashier removed the coupon and gave him the 50 cent discount.
Which type of coupon did Anthony receive?

a. on-pack coupon
b. in-pack coupon
c. online coupon
d. shelf-delivered coupon
e. instantly redeemable coupon