In 1916, two girls of wealthy families, best friends from Auburn, N. Y.—Dorothy Woodruff and Rosamond Underwood—traveled to a settlement in the Rocky Mountains to teach in a one-room schoolhouse. The girls had gone to Smith College. They wore expensive clothes. So for them to move to Elkhead, Colo. to instruct the children whose shoes were held together with string was a surprise. Their stay in Elkhead is the subject of Nothing Daunted: The Unexpected Education of Two Society Girls in the West by Dorothy Wickenden, who is a magazine editor and Dorothy Woodruff's granddaughter.

Q: Why did Dorothy and Rosamond go to the Rocky Mountains?

To teach in a school.

To study American history.

To write a book.

To do sightseeing.

细节理解题。根据选段“In 1916, two girls of wealthy families, best friends from Auburn, N.Y.—Dorothy Woodruff and Rosamond Underwood—traveled to a settlement in the Rocky Mountains to teach in a one-room schoolhouse. (1916年，来自纽约奥本市的两个富裕家庭的女孩——Dorothy Woodruff和Rosamond Underwood——来到落基山脉的一个定居点，在一间只有一个房间的学校教书。)”可知，Dorothy和Rosamond去落基山脉是为了去学校里教书。故选A。