A Liquid Is at Its Equilibrium Vapor Pressure at 20^oC

A liquid is at its equilibrium vapor pressure at 20^oC. The following changes are then made:
(1) The liquid is transferred into a container with a wider opening.
(2) More liquid is added to the container.
(3) The temperature is increased to 30^oC.

The vapor pressure is then observed to increase. Which of these changes contributed to the increase in the vapor pressure?

A) (1) only
B) (2) only
C) (3) only
D) (1) and (2) , but not (3)
E) (2) and (3) , but not (1)