Final answer:
To determine which row has 91 seats, we can set up and solve an equation. The answer is Row C) 91.
Step-by-step explanation:
To determine which row has 91 seats, we can set up and solve an equation. Let's assume the row number is x. Since we know that the row has 91 seats, we can set up the equation: x = 91. Therefore, the answer is Row 91 (option C).