I am going to have to go with, C, because the other answers are Invalid.
<span>The opposite sides can be proven parallel to each other if the lines would not intersect each other if the lines were much longer. It should also have the same straight horizontal measurement of distance in between the space. Measurement of parallel lines in a parallelogram can be determined using the slope formula.</span>
umm, i the the desuetude what no one sec.
