Answer:
substances with weak intermolecular forces have higher vapor pressures and are more volatile, so im going with A........
Step-by-step explanation:
Eliminate all other options:
It cant be c because a substance that has weak intermolecular forces between its molecules is expected to have low viscosity.
It cant be b because strong intermolecular forces have higher surface tensions than weaker forces
It cant be d because substances with weak intermolecular forces have higher vapor pressure
I hope this helps :)