Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees? (1)       Two of the interior angles of ABCD are right angles.(2)       The degree measure of angle ABC is twice the degree measure of angle BCD._出国考试答疑器_GMAT

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Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?

(1) Two of the interior angles of ABCD are right angles.

(2) The degree measure of angle ABC is twice the degree measure of angle BCD.

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我觉得应该选C,答案是E。请老师解答，谢谢。

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