The correct answer is: A. Price à 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 à Quantity.