In quadrilateral MNPQ, the diagonals MP and NQ intersect at O such that MO=OP and NO=OQ. What can you conclude about MNPQ?
a) MNPQ \text{ is a rectangle}
b) MNPQ \text{ is a parallelogram}
c) MNPQ \text{ is a rhombus}
d) \text{No specific conclusion can be drawn about } MNPQ