If ATC is $100,MC is $90 and AVC is $80,then

A) ATC is rising and AVC is rising.
B) ATC is falling and AVC is falling.
C) ATC is rising and AVC is falling.
D) ATC is falling and AVC is rising.

ATC

The average total cost is defined as the total production cost divided by the quantity of produced output.

AVC

Average Variable Cost, which is the cost of labor, materials, or overhead that changes according to the level of production output.

MC

Marginal cost, the increase in total cost that arises from an extra unit of production, important for decision-making in production and pricing.