Which best describes einstein’s new explanation of light and gravity?

einstein created a new law, because his explanation of the interaction between light and gravity provided unity amongst many facts.
einstein created a new law, because he discussed only light, mass, and gravity and made an easily observable, factual statement about them.
einstein created a new theory, because his explanation of the interaction between light and gravity provided unity amongst many facts.
einstein created a new theory, because he discussed only light, mass, and gravity and made an easily observable, factual statement about them.