Answer: B. If the market demand curve becomes more elastic, the firm's demand curve will become more elastic
Step-by-step explanation:
Monopoly is a market structure whereby there is just one single supplier for a particular good or service. The monopolist controls the price.
We should note that the monopolist enjoys market power due to theofact that its product has an inelastic demand that is, a price change will have a minimal impact on the demand.
But the monopoly power will reduce in a case whereby the market demand curve becomes more elastic, then the firm's demand curve will become more elastic as well.