The best explanation for the causes of the Slave Code of 1740 is:
The Slave Code of 1740 was caused by a large-scale, deadly slave rebellion in South Carolina, and growing fears of future revolts.
The 1739 Stono Rebellion, where enslaved people rose up against their enslavers, heightened fears among white colonists regarding the potential for future uprisings. In response, the Slave Code of 1740 was enacted to impose stricter regulations on enslaved people and to reinforce the institution of slavery in South Carolina.