The correct answer is: A. Price รย Quantity.
Total revenue is the total amount of money a company makes from selling its products or services. It is calculated by multiplying the price of a product or service by the number of units sold.
Price is the amount of money that a customer pays for a product or service. It is determined by a number of factors, including the cost of production, the demand for the product or service, and the competition.
Quantity is the number of units of a product or service that are sold. It is determined by a number of factors, including the price of the product or service, the marketing efforts of the company, and the preferences of consumers.
Income is the total amount of money that a person or company receives during a period of time. It is calculated by adding up all of the sources of income, such as wages, salaries, interest, and dividends.
Therefore, the correct answer is A. Price รย Quantity.