Me and you will get a lot of points. analysis and conclusion must be at least to 2 to 3 paragraphs

The index is showing the refraction levels; it shows how easy light can pass through an object, knowing that a vaccum is the easiest medium that light can pass through, going do the list, light will struggle to make it through the lower level mediums. you can add examples in by saying, "I can strengthen my claim by saying Light can easily go through olive oil than glass would due to the fact that glass is lower on the Index of reaction of light"

The answer would be d. hope this :