d. claimed that the world was governed by a single divine plan.
Explanation:
This is the statement that best represents one important belief of Stoics. Stoicism is a school of philosophy that began in Athens in the 3rd century BC. This philosophy emphasizes a system of personal ethics that focuses on virtue, and understands most external things only as vehicles for virtue to act upon. Stoics also believed in a divine or natural plan of which every person is part of, and believed it to be our duty to fulfill such a purpose.
