Answer:
b. Free gift with purchase
Explanation:
The promotion tactic that the provider is trying to use is a Free gift with purchase. This is because by making your first every purchase the company is basically gifting you a certain amount of money through a discount of your purchasing total. Companies tend to do this in order to attract customers through the enticement of free money or products/gifts. They are able to do this because a single purchase will make them more profit than they are wasting on the gift and can lead to recurring customers.
