Step-by-step explanation:
A) To maximize profit, they should sell 175 thousand barrels, since that's the highest point on the curve.
B) They will lose money when the curve is below the x-axis, which is approximately less than 25 thousand barrels and more than 325 thousand barrels.
C) They will break even when the curve intersects the x-axis, which is approximately 25 thousand barrels and 325 thousand barrels.
