A, B, C are all correct. A square and the parallelogram are all four sided and have four vertices
A trapezoid has only a pair of parallel lines but the other two pair is not.
The square and the parallelogram have 2 pairs of parallel lines
No, i don't agree with the statement. Some parallelograms have 2 pairs of parallel lines but 1 pair is not the same as the other pair.
BFDE has 2 pairs of parallel lines. Line FD, point F is also in the middle of BC and Line BE, point E is in the middle of AD