Consider the following. 1. Output × Price = Total Revenue 2. MR cannot be zero 3. TR = MR × Q Select the correct answer

The correct answer is D. All of the above.

• Output × Price = Total Revenue (TR) is a fundamental relationship in economics. It states that the total amount of revenue a firm earns is equal to the number of units it sells multiplied by the price it charges per unit.
• MR cannot be zero. This is because marginal revenue (MR) is the additional revenue a firm earns from selling one more unit of output. If MR were zero, then the firm would not earn any additional revenue from selling one more unit, and it would not make sense for the firm to produce any more output.
• TR = MR × Q. This equation simply states that total revenue (TR) is equal to marginal revenue (MR) multiplied by quantity (Q). This equation is true because TR is equal to the number of units sold multiplied by the price per unit, and MR is equal to the additional revenue earned from selling one more unit.

Therefore, all of the statements in the question are true.