The budget line is also known as the

Iso-utility curve
Production possibility line
Isoquant
Consumption possibility line

The correct answer is: D. Consumption possibility line.

A budget line is a line that shows the combinations of goods and services that a consumer can afford to buy with a given amount of income and given prices of the goods and services. It is also known as the consumption possibility line.

An iso-utility curve is a curve that shows all the combinations of goods and services that give a consumer the same level of satisfaction or utility.

A production possibility line is a curve that shows all the combinations of goods and services that can be produced with a given amount of resources and given technology.

An isoquant is a curve that shows all the combinations of inputs that can produce a given level of output.

In conclusion, the budget line is also known as the consumption possibility line. It is a line that shows the combinations of goods and services that a consumer can afford to buy with a given amount of income and given prices of the goods and services.