An Egg Falls from a Bird's Nest in a Tree

Multiple Choice

An egg falls from a bird's nest in a tree and feels no effects due to the air. As it falls,

A) only its momentum is conserved.
B) both its kinetic energy and its momentum are conserved.
C) both its mechanical energy and its momentum are conserved.
D) only its mechanical energy is conserved.
E) only its kinetic energy is conserved.