Read the excerpt from "Code Talkers.” The use of Navajo code was so successful that its existence was kept secret until 1968 so that the Marines could continue to use it, if necessary. Two decades later, many of the code talkers were recognized for their service. In 1982, President Ronald Reagan declared August 14 Navajo Code Talkers Day, and in 2000 President Bill Clinton awarded the Congressional Medal to the first twenty-nine code talkers. In the years since, code talkers from the Navajo and thirty-two other American Indian tribes have been awarded the medal.

The author’s purpose in this paragraph was to
a.) entertain readers with a story about how code talkers received medals for their service during wartime.
b.) inform readers that the code talkers were recognized by the US government for their critical work during wartime.
c.) educate readers about the history of US presidents and holidays created to honor groups like the code talkers.
d.) persuade readers that they should learn to create code so they can be recognized by the US government.