If a crumpled piece of notebook paper and a flat sheet of notebook paper are dropped at the same time from the same height, why does the crumpled piece of paper land first?

a
The flat paper has more mass.
b
The flat paper has more air resistance.
c
The crumpled paper has less mass.
d
The crumpled paper has more gravitational force exerted on it.

b) The crumpled paper has more air resistance, which slows it down less than the flat paper, allowing it to fall faster and land first.