Answer:
E. We can't be sure how the project is going
Explanation:
This numbers alone are not sufficient information to evaluate the project.
We could be spending less because we saved cash in a part of the project, because there are unpaid expenses which are not due yet. There could a series of factor involving this difference. This is only saying the project has available from their original budget 5,000 more dollars. It could spend this without incurring in additional cash spending. Going beyond this will require some kind of approval from the managers.
Resuming: the only conclusion from this, is that the project has available 5,000 dollars to spend if necessary. We cannot know if the project is going well or not.