In Which of the Following Situations Would Use of the Competitive

In which of the following situations would use of the competitive parity budget-setting method be most appropriate?

A) Two or more companies are introducing a totally new product to the market.
B) Two or more companies exist in an oligopoly, and are planning on a product diversification strategy.
C) Two or more companies exist in pure competition and compete on the basis of product differentiation.
D) Two or more companies are competing with similar products and similar promotional goals.