Final answer:
The political and military reforms of Diocletian and Constantine greatly enhanced the Roman army and civil service institutions, but drained public funds.
Step-by-step explanation:
The political and military reforms of Diocletian and Constantine greatly enhanced the army and civil service institutions but drained most of the public funds. Diocletian reorganized the Roman army and built new roads for military use, making it larger and more efficient. Constantine issued new currency based on a fixed gold standard to stabilize the economy. These reforms did not result from the Roman Empire adopting Islam as its official religion, as Islam emerged later in history.