In a Torricelli Barometer, a Pressure of One Atmosphere Supports

In a Torricelli barometer, a pressure of one atmosphere supports a 760 mm column of mercury. If the original tube containing the mercury is replaced with a tube having twice the diameter of the original, the height of the mercury column at one atmosphere pressure is ________ mm.

A) 380
B) 760
C) 1.52 × 10³
D) 4.78 × 10³
E) 121