document.write( "Question 293150: Which of the following conditions does not ensure that a quadrilateral is a parallelogram? \n" );
document.write( "a. The diagonals bisect each other \n" );
document.write( "b. Both pairs of opposite sides are parallel \n" );
document.write( "c. A pair of opposite angles are congruent \n" );
document.write( "d. All of the above \n" );
document.write( " \n" );
document.write( "
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