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Question $5$ of $15$

a$.$ A firm's $$ are costs that increase as quantity produced increases. These costs often show $$ illustrated by the increasingly steeper slope of the total cost curve.

variable costs; constant returns to scale

fixed costs; opportunity costs

fixed costs; technological changes

variable costs; diminishing marginal returns

b$.$ A firm's $$ are costs that a company incurs even if it produces no output. In the short run, these costs $$ as production increases.

variable costs; increase

fixed costs; increase

variable costs; do not change

fixed costs; do not change