Answer the following question given this paragraph: 

Mercury is the smallest planet. It has no moon. It is also the planet closest to the Sun. Pictured below is the surface of Mercury covered with craters ( Figure below ), like Earth’s Moon. Many of the impact craters are billions of years old. This means that Mercury hasn’t changed much geologically for billions of years. It has no plate tectonics. With only a trace of an atmosphere, it has no weather to wear down the ancient craters.


Q: What is the name of the smallest planet in our solar system, which is also nearest to the sun?

 Choices:

- mars

- jupitor

- earth

- mercury

A:
mercury
