Chlorine, , Is a Gas at Room Temperature, but Bromine

Chlorine, , is a gas at room temperature, but bromine, , is a liquid. Explain.

A) Chlorine atoms are larger and this makes the formation of induced dipole-induced dipole attractions more favorable.
B) Bromine atoms are larger and this makes the formation of induced dipole-induced dipole attractions more favorable.
C) The smaller chlorine molecules are able to pack together in a tighter physical orientation.
D) The bromine ions are held together by ionic bonds.