Which statement is true about all parallelograms? A) All four sides are congruent. B) The interior angles are all congruent. C) Two pairs of opposite sides are congruent. D) The diagonals are perpendicular to each other

(C) Two pairs of opposite sides are congruent.

Step-by-step explanation:

A parallelogram is a four-sided plane rectilinear figure with opposite sides parallel.

From the properties of parallelogram, it is known that the opposite sides and opposite angles of the parallelogram are equal in measure.

Also, the diagonals of parallelogram bisect each other.

For example in the gievn parallelogram ABCD, AB=CD and AD=BC,

Therefore, option C is correct out of all the other options because it is a property of parallelogram.