Scenario 15-3 Stacey Is Making Her Weekly Trip to the Grocery Store

Scenario 15-3
Stacey is making her weekly trip to the grocery store. She takes with her a National brand coffee coupon worth 50 cents. While shopping she was asked if she would like to try a slice of pizza from a sales person. After tasting it, the sales personal directs her to where the brand is available. When Stacey arrives at her favorite brand oftoothpaste, she is delighted to find that she would receive a toothbrush along with the toothpaste attached to the box for no charge. She then runs into a cardboard cutout of an actor from a medical drama that she watches on TV, with a box full of pain relievers built into it. At her last stop, the cereal aisle, she notices that a brand offers a chance to buy a T-shirt with a picture of the brand's cartoon character. 
-(Scenario 15-3) Stacey is surprised to see that there was a toothbrush attached to the box of her favorite toothpaste.This is an example of a(n) : 

A)  on-package sampling. 
B)  self-liquidating premium. 
C)  mobile sampling. 
D)  price-off deal.