Prior to the Discovery of Atmospheric Pressure, the Operation of Siphons

Multiple Choice

Prior to the discovery of atmospheric pressure, the operation of siphons was explained by the principle that:

A) Water is naturally drawn into a region of least pressure.
B) The water in siphons is supported by demons.
C) Nature abhors a vacuum.
D) Water rises in an open tube by capillary action.
E) Higher pressure results in a greater volume of flow.