Answer:
B.All parallelograms are quadrilaterals.
Explanation:
A. Not all parallelograms are rectangles but all rectangles are parallelograms
C. Not all quadrilaterals are parallograms, for example the trapizoid isnt a parallogram but it is a rectangle
D. Not all rectangles are squares because they don't all have 4 equal side lengths. But all squares are rectangles