To convert from the 24-hour clock to the 12-hour clock:
If the time is less than 1200, it is a.m. — use the hours as they are (dropping any leading zero).
• 0310 is less than 1200, so it is a.m.
• Hours = 03 → 3, minutes = 10
• 0310 = 3.10 a.m.
Final Answer: C: 3.10 a.m.