Answer:
A) to find out what people want in a product
D) to quickly sell products
Step-by-step explanation:
Companies offer free samples as a promotion strategy in order for your target market to get to know your product and try it. For example, if you give a free cookie and the customers try it, you will be able to determine if they liked them or not.
Another promotional activity involves lowering the price of a product, which usually should increase the quantity demanded. This can be done as part of larger promotional strategy that involves several products or can be done to specifically increase the quantity demanded of one product due to recent lower sales numbers. Sometimes you might want to sell your current stock and lower the price to sell them faster, e.g. clothes are generally put on sale when the season is about to end.