Answer: Possibility of trial use
Explanation: Adoption rate refers to the speed at which a new technology or new product, such as a food product, is adopted by consumers, i.e. at what speed it is purchased, since it is new and has yet to break into the market. This rate is determined by the number of customers who buy a new product over a given time interval.
In this case, the possibility of trial use is a characteristic that affects the rate of adoption. Trial use is nothing but the or promotion of a new product, where free samples are given to try, which means possibility to try that product and a .50 off if you buy that same product. That way, many like Jackson, with the ability to try a new product and make sure it is good, will decide to buy it, and with that they have .50 off coupon on their first purchase.