Explanation:

- A monopolist is called a price maker.

- Here’s the thing: they’re the only seller in the market, so they set the price instead of following one.

- Option 1: Maker — This is the correct answer. Monopolists decide what price to charge.

- Option 2: Taker — This one’s about perfect competition, where firms just accept the market price.

- Option 3: Adjuster — Not really a standard term in economics. Doesn’t fit here.

- Option 4: None of these — Not needed, since “maker” is right.

So, a monopolist sets the rules on price. No one tells them what to charge—they make that call.