When is a vessel operator required to use navigation lights?

During periods of restricted visibility.

Explanation:

Navigation lights are particularly needed when boaters meet at night. These lights have to be used from sunset to sunrise, as well as through times of restricted visibility, like in the case of fog, mist, snow, or heavy rain. The different types of navigation lights are Sidelights, Sternlight, Masthead Light, and All-Round White Light.

the correct answer is d: "party organizers, volunteers, voters, and elected officials."

she thought that scott was her dead husband's property.

hope it : )