What are the heights of the flagpoles on which the National Flag is flown?

The correct answer is based on the standards set for the height of flagpoles that display the National Flag. Flagpoles at designated locations are typically required to be of certain heights to ensure proper visibility and respect for the flag. The standard heights of 50, 60, and 75 feet are commonly used to accommodate the needs of various ceremonial and official displays. These heights help the flag to be seen from a distance and allow it to fly freely without obstruction.

In addition, these measurements are often aligned with the guidelines provided by the flag code or government recommendations, ensuring that the flag is both appropriately displayed and able to represent the national dignity it symbolizes. The associated heights also take into consideration factors such as the surrounding environment and the size of the flag itself, which should be proportional to the flagpole to maintain aesthetic balance.

The other options present heights that do not typically meet standard practices for flagpole heights in public and official settings, making them less suitable for flying the National Flag.