What do rectangles and rhombuses have in common.

What do rectangles and rhombuses have in common?

Sources:

A. They both have 4 sides and 4 angles.

B. Opposite sides are parallel

C.A rhombus is a four-sided shape where all sides have equal length.
    A rectangle with four sides of equal length is a square.

E. Rectangle equal (360°/4 = 90°) and Rhombus intersect to form 90 degree angles. * There are four right triangles whose angle sum is equal to 180 degrees

1st  A, B, and C 
           or
2st  A, B, and E

I hope it helped :). I'm not so sure but I think is is the 1st.