At 25?°C, the vapor pressure of diethyl ether is higher than the vapor pressure of its isomer n-butanol, because

A. diethyl ether has a higher density than n-butanol.

B. diethyl ether has weaker intermolecular forces than n-butanol.

C. diethyl ether has a higher surface tension than n-butanol.

D. diethyl ether has weaker intramolecular forces than n-butanol.

E. diethyl ether has a lower critical temperature than n-butanol.