A dairy cooperative proposes to pay its member farmers a bonus on milk delivered before six in the morning, so that more milk is ready for the early collection van. One member objects that the bonus will not increase the quantity delivered before six, but will merely ______. Which of the following best completes the member's objection?

The objection needs a completion under which the bonus is paid out but the early-morning quantity does not really grow. Milk that would have arrived at seven simply arriving at six fits exactly: the cooperative pays a bonus for a shift in timing while the total milk available stays the same. The other completions describe effects that would either help the cooperative or have nothing to do with how much milk reaches the early van.