Sarah is writing a research paper for history class on the vietnam war. she is required to use one primary source in her research. which of the following is an example of a primary source?
a. a biography of a vietnam veteran
b. a website
c. her history textbook
d. an interview with her dad who is a vietnam veteran

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.

the answer is a. harriet tubman was a nurse on the battlefield.