The author used the word "curious" to mean _________.

A．wants to share his interests in his discoveries about the intellectual life with his reader
B．gloats over the difficulties of ancient writers
C．slyly introduces the fact that he is economically secure
D．is a practical historian who sticks to established facts

A．received little attention
B．was insignificant, if compared with the impact of the frontier on cowboys
C．was not so important as the church or the state
D．was overlooked completely