Question: Rocks and Earth and on the Moon are made of similar materials. What does this observation most likely suggest?

What is the correct answer to the question from the following choices?
Pick from: [+] Both the Moon and Earth split off from the Sun.; [+] Life must have existed on the Moon at one time.; [+] The Moon was probably formed from material from Earth.; [+] The whole solar system is made up of the same kinds of rocks.;
The Moon was probably formed from material from Earth.