Which of the Following Is Not an Accurate Specification of a Firm's

Multiple Choice

Which of the following is not an accurate specification of a firm's long-run total cost curve? FC stands for fixed cost, VC stands for variable cost, and AC stands for average cost, below.

A) $T C = F C + V C$ , where $\mathrm { FC } = 0$
B) $T C = F C + V C$ , where $\mathrm { FC } > 0$
C) $T C = w L + r K$ , where $L$ and $K$ are chosen to minimize cost, and $w$ and $r$ are input prices.
D) $T C = A C x Q$