In the figure below, three circles of radius 1 are tangent to one another. What is the area of the shaded region between them（）

A. these were feminist writers
B. although well-intentioned, they were ineffectual
C. before the 20th century there was little interest in women’s literature
D. modern literature is dependent on the women’s movement
E. the interest in feminist issues is not new

A.A
B.B
C.C
D.D
E.E