The Difference Between Long-Term and Short-Term Profit Maximization Is That

The difference between long-term and short-term profit maximization is that in the short term,

A) businesses focus on achieving as much profit as they can, given that fixed costs cannot be changed.
B) businesses focus on achieving as much profit as they can, given that they can vary all inputs, even to the point of shutting down.
C) businesses are not able to maximize profits because they can vary all of their inputs, making the calculations too complicated.
D) businesses focus on achieving as much profit as they can, but in the long term, businesses always eventually shut down.