give explanation also

Mobile phone portability allows consumers to retain their phone number if they change to a different phone network, which will tend to: reduce market power in the phone industry. O encourage the formation of natural monopolies. O discourage product differentiation and increase switching costs, increase barriers to entry in the phone industry. D Question 12 2 pts If a profit-maximizing firm sells at the price P = $4, average variable costs AVC - $2, and average total costs ATC - $8, which of the following will the firm choose to do: Continue to operate in the long run. Shut down in the short run. Shut down in the long run. Continue to operate in the long run