The author of "Code Talkers” supports the idea that the code talkers were essential to America’s war effort by:
B. highlighting the complexity of the Navajo language the code talkers used.
Explanation:
In "Code Talkers", Joseph Bruchac highlights the use of Native American languages as codes during the war. More specifically, he gives special attention to the Navajo language because of its complexity. The other languages could be more easily learned by German and Japanese students, who could then break the codes and relay messages to their countries. On the other hand, the Navajo language was so difficult that almost no one that was a non-Navajo could speak it. That made it much harder to break codes that used the Navajo language.
An "umbrella topic" is usually something that falls under a broad and generalized category that can be broken down into specific groups and condensed further into subgroups/categories.
