Answer: B. Each firm Charges a HP
Explanation:
Nash Equilibrium is a point where there is no incentive from deviating for each firm to deviate or change its strategy.
Firms reach Nash Equilibrium Point when they both charge high price (HP). When both firms charge high price (HP) each firm will earn 10 million dollars at this point there is no incentive for either firm to change and charge lower price because they will earn $ 1 million. Each firm will just choose to charge high price regardless of what the other firm is doing.