Some women, particularly those over 35 years of age, seem to be more ______ more serious problems such as clots in veins if they smoke heavily.

A．And
B．Then
C．But
D．Because

A．The artful nature of Native American life compels the author to explore and write about that heritage.
B．Art is an important part of Native American life and should be a part of everyone’s existence.
C．The author remembers his childhood, especially his parents and the elders in his community, in a very positive way.
D．A desire to return to traditional Native American values led the author to write about Native American issues.