Final answer:
The age difference between the time the Midshipman was appointed at two years old and reported at six years old is 4 years.
Step-by-step explanation:
The age difference between the time the Midshipman was appointed and the time they reported for active duty can be determined by calculating the difference in years between the two ages. The Midshipman was appointed at two years old and reported for active duty at six years old. To find the age difference, you subtract the appointment age from the age when they reported for duty:
- Age when reported for duty: 6 years old
- Age when appointed: 2 years old
- Age difference: 6 - 2 = 4 years
Therefore, the age difference is 4 years, which corresponds to option 2).