Given quadrilateral abcd whose diagonals intersect point e. which of the following methods could be used to prove that quadrilateral abcd is a parallelogram?
i. abe cde to show that the diagonals bisect each other.
ii. abc adc to show that both pairs of opposite sides are congruent.
iii. aed ceb to show that one pair of opposite sides is both congruent and parallel.

i and ii
i and iii
ii and iii
i, ii, and iii