Step 1: Understanding the Concept:
In an options contract, the buyer has the right (not obligation) to buy or sell, while the seller has the obligation.
Step 2: Detailed Explanation:
To acquire this "right," the buyer must pay a fee to the seller. This fee is known as the "Premium."
The "Writer of an Option" is the seller, who receives the premium.
Therefore, whether it is a Call or a Put, the "Buyer" is always the one paying the premium.
Step 3: Final Answer:
(D) Call Buyer