The revision of Sentence (5) that uses the most vivid imagery is option D: "We go out while the frost is still shining both in the tree limbs above and the forest floor below."
This sentence paints a vivid picture in our minds by describing the frost that is shining on both the tree limbs above and the forest floor below. The use of the word "shining" creates a visual image of the frost reflecting light and adds a sense of beauty to the scene. This imagery helps us imagine the cold and crisp atmosphere during their outing.
In contrast, options A, B, and C do not provide as much vivid imagery. Option A simply mentions that they go out while it is still cold, which is less descriptive. Option B adds a bit more detail by mentioning that it is freezing and that the speaker feels really cold, but it doesn't provide any visual imagery. Option C mentions that it is chilly and the speaker wears coats to stay warm, but it doesn't paint a clear picture in our minds.
Overall, option D is the most vivid and descriptive revision because it uses specific details to create a visual image of the frosty scene.