I will give out brainliest and 15 points, I think the answer is either A or C but I'm not sure the passage is the picture.

Which supporting detail from the passage is LEAST important to include in a summary?

A.The code talkers were unrecognized for many years.
B.Code talkers were faster than previous code breakers.
C.Navajo is not a written language.
D.No one ever cracked the Navajo code.