Light Pollution I Grew Up in the City, a Place So Full

Light Pollution
I grew up in the city, a place so full of streetlights, spotlights, and searchlights that the sky was never dark enough to see the Milky Way. But last year, I went on a camping trip through the Grand Canyon. When I saw the night sky for the first time, I was in awe. I could not believe how many stars there were.
As cities push farther and farther into the wilderness, they create light pollution, the brightening of the night sky by artificial light sources. Light pollution not only hinders our ability to see the beauty of the stars, but it might be causing other problems as well.
Light pollution also disrupts the lives of certain animals. For example, too much artificial light can prevent newly-hatched sea turtles from finding the ocean. Owls and other birds that hunt at night can injure themselves by flying into brightly lit buildings.
So what is the solution? Obviously, we cannot turn off all of the lights every night. But we can reduce the amount of light we send into the sky. Homeowners should use motion sensors on outdoor lights. Cities should turn off (or at least dim) streetlights after midnight. Businesses and office buildings should turn off their lights when they close for the day. Turning off the lights will help animals and restore the night sky to its former glory.
Question: What is the best summary of the passage?

A) Light pollution is the brightening of the night sky with artificial lights. It disrupts the lives of many animals. We can help to solve the problem by dimming or turning off outside lights at night.
B) The author grew up in a city where light pollution made it impossible to see the Milky Way in the night sky. The author was surprised at the number of stars in the sky over the Grand Canyon.
C) Light pollution affects the lives of animals in a negative way. For instance, it can prevent young sea turtles from finding their way to the oceans. It can also cause owls to fly into brightly lit buildings.
D) Cities create light pollution as they push farther into wilderness areas and light up the night sky with artificial light. This light makes it difficult if not impossible to see the beauty of the stars at night.