Refer to the Payoff Matrix

Refer to the payoff matrix. Bob's Burgers and Sam's Sandwiches are competing restaurants in a small town. Both are considering adding pizza to their line of products. If this is a sequential game but we don't know who moves first, what can we say about the final outcome?

A) There is no Nash equilibrium attainable for this game.
B) Cell A represents the only Nash equilibrium possible for this game.
C) Cell D represents the only Nash equilibrium possible for this game.
D) Cells B and C both represent possible Nash equilibrium outcomes for this game.