How could you combine the following two sentences into one compound sentence

How can you answer this one without the 2 sentences

The correct answer is letter C: It supports the myth by providing facts about how the Kiowas first named themselves with words that mean “coming out.” The historical manner in which the author explained the origins of the Kiowa gives a foundation as to the mythical descriptions that have been passed on from generations to generations. People are now more aware of the context and background of these native ancestors of the past.