A power-driven vessel of 65 meters in length carries two masthead lights. What is the minimum required vertical separation between the forward and after masthead lights?

Why B is correct

33 CFR §84.02(a)(ii) states that when two masthead lights are carried, the after one shall be at least 2 meters vertically higher than the forward one. Additionally, §84.02(b) requires that the after light be seen over and separate from the forward light at 1,000 meters from water level.