The reader is introduced to the marlin because Santiago sees one of the projecting sticks dip in the water (B).
In <em>The Old Man and the Sea</em>, the main character becomes aware of the presence of the marlin when he realizes something is tugging at his hundred-fathom-deep fishing line. Because of the strength of the bite, the stick to which the line is attached is pulled into the water. Santiago immediately recognizes the fish as being a large marlin.
Add several paragraphs describing the rules of reality shows in the past
C. Many students said, "They would love to have a salad bar in the school cafeteria."