During world war ii, several hundred navajo indians made a major contribution to the allied victory.

which detail is least supportive of that main idea?

a.
navajo code talkers used a code to translate and transmit messages.

b.
the navajo are well known for their artistry in jewelry and textiles.

c.
the code allowed allied communication to be extremely secure—more secure than wartime communication had ever been.

d.
the code was simply the navajo language, which is difficult to learn.