How could a quadrilateral be a parrallelogram

A. one pair of sides is parallel and one pair of angles is congruent

B. one pair of sides is congruent and one pair of sides is congruent

C. one pair of sides is both parallel and congruent

D. the diagonals are congruent

i don't know the answer but im going to list conjectures of what make a parallelogram a parallelogram

Step-by-step explanation:

Parallelogram opposite angles conjecture: Opposite sides of a parallelogram are congruent.

Parallel opposite sides conjecture: opposite sides of a parallelogram are congruent.

Parallelogram diagonals conjecture: the diagonals of a parallelogram bisect each other

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the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.