One day an army group won a land battle against the enemy. The commander feared that the enemy's powerful air force might bomb his camp that night in revenge. So he ordered all lights to be put out at 7:00 PM. At midnight the commander went round inspecting the camp. Seeing a light in a tent, he entered it. His son, an officer under him, was writing a letter. The son explained that he was writing to his mother about his brave deeds in battle. The commander told his son to add to his letter that by the time his mother received the letter he would have been shot dead for indiscipline.
The commander entered his son's tent because he

Options

A. wished to see and talk to his son
B. suspected that enemies had entered his tent
C. wished to send a message to his wife.
D. had to punish any soldier who disobeyed his order