Answer:
The answer is The average total cost of production will decrease.
Step-by-step explanation:
It cannot be known to be true if the marginal cost will decrease/increase for the very next unit of production. this will depends on what point of curve of marginal cost and the level of the current production..
However, it is certain that, is the average total cost for the next unit produced will decrease, because the ATC is defined as total cost/output.
The next unit produced would definitely reduce the ATC, Since the total output is in the denominator, this cost would move over an output larger.