What is price discrimination?Part $2$Price discrimination is whenPart $3$A$.$firms charge a higher price for a product when it is first introduced and a lower price later.B$.$firms charge a higher price to customers who are less sensitive to pricewho are less sensitive to price and a lower price to consumers who are more sensitive to pricewho are more sensitive to price.C$.$firms charge each consumer a different price equal to that consumer's willingness to pay.D$.$both a and b$.$E$.$all of the above.