Answer:
c) Offering a discount to students and seniors.
Explanation:
Price discrimination involves a supplier selling the same good at different prices to different customers. Price discrimination is usually done to take advantage of consumer surplus.
If the choclatier knows the price group that will pay lower, he can target them and give the option of paying lower.
In this case offering discount to students and seniors shows the choclatier has identified these class of customers as the one that are willing to by chocolates below $20.