Explanation
Correct answer: C.
Choice C is the best answer. The sentence emphasizes a similarity between the Choctaw Code Talkers and the Navajo Code Talkers by explaining that both groups used their native languages to transmit coded messages for the military.
Why the other choices are wrong
Choice A
Choice A is incorrect. The sentence describes the Choctaw Code Talkers; it doesn’t emphasize a similarity between the Choctaw Code Talkers and the Navajo Code Talkers.
Choice B
Choice B is incorrect. The sentence introduces the Navajo Code Talkers; it doesn’t emphasize a similarity between the Choctaw Code Talkers and the Navajo Code Talkers.
Choice D
Choice D is incorrect. The sentence emphasizes a difference between the Choctaw Code Talkers and the Navajo Code Talkers; it doesn’t emphasize a similarity.