Concept:The Muslim defeat at Uhud was due to a key tactical mistake made during the battle.
Explanation:The Prophet stationed archers on a hill to protect the Muslim army from a flank attack.
He strictly ordered them not to leave their position under any circumstances.
When the Muslims began winning, the archers disobeyed and left to collect war spoils.
This left the rear unprotected, allowing the enemy cavalry to attack from behind.
As a result, the Muslim forces suffered heavy losses and were defeated.
Answer:C. Disobedience to the prophet.