Answer:
Option B is the correct answer because Cost-Volume Profit analysis is the changes that arosed in profit due to the increase or decrease in the cost of unit product. It also measures the implications of increase or decrease of volume of units sold on the core operations of the company.
Option A is incorrect because the difference in selling price and variable cost is contribution which is the concept of marginal costing technique.
Furthermore, Option C is also incorrect because pricing is different from the cost volume profit analysis because it tells what must be the price of the product depending upon the cost of the product and market research.
Option D is also incorrect because "what if?" deals with changing any variable and keeping the other aspects of the company constant and taking a look on the outcomes arising due to the change.