The following shows an image of Earth from space. Which best describes why Earth is often called the "Blue Planet"? A. Most of Earth is covered in water causing it to appear blue from space. B. Most of Earth is covered in land causing it to appear blue from space. C. The blue from Earth's sky causes it to appear blue from space. D. The blue color in space causes it to appear blue.

A. Most of Earth is covered in water causing it to appear blue from space.