The correct answer is B) horizontally banded buoys. According to the United States Coast Guard's regulations, green lights are typically displayed on horizontally banded buoys. These buoys are used to mark the edge of a navigable channel or waterway, indicating the safe side to pass. The green light helps mariners identify the appropriate side to navigate. The other answer choices are incorrect because spherical buoys (A) typically display white lights, yellow buoys (C) display yellow lights, and vertically striped buoys (D) are used for different purposes, such as marking the centerline of a channel, and do not typically display green lights.