Curve D Curve C PRICE Curve B Curve A Q, Q Q, Q, Q, QUANTITY Refer to Figure 15-2. If the monopoly firm is currently producing Q4 units of output, then a decrease in output will necessarily cause profit to Oa. decrease. Ob. remain unchanged. Oc. increase regardless of the new level of output. Od. increase if the output is between Q 3 and Q 4