The Cost $\mathrm{C}$ , of Producing $q$ Items Is Given by the Formula

The cost, $\mathrm{C}$ , of producing $q$ items is given by the formula $C=C_{0}+m q$ , where $C_{0}$ and $m$ are positive constants. If the quantity produced decreases, what happens to the cost of production?

A) It increases.
B) It stays the same.
C) It decreases.
D) Cannot tell without knowing the values of $C_{0}$ and $m$ .