There Are Two Vessels;one Contains Twice as Many Molecules as the Other

There are two vessels;one contains twice as many molecules as the other but has the same volume.

A) They must have the same pressure.
B) They must have the same temperature.
C) At the same pressure,the one with more molecules has 2 times the temperature (K) .
D) If they have the same pressure,the one with more molecules has 1/2 the temperature (K) .
E) They must both have the same temperature and pressure.