Which of the Following Observations Concerning the Market Maturity Stage

Which of the following observations concerning the market maturity stage is FALSE?

A) Many aggressive competitors have entered the race for profits.
B) There is a long-run downward pressure on prices.
C) New firms cannot enter the market at this stage.
D) Promotion costs rise and some competitors cut prices to attract business.
E) Persuasive promotion becomes more important during this stage.