Which of the following measurements would accurately reflect gauge pressure?

Gauge pressure is defined as the pressure measured relative to the ambient atmospheric pressure. It represents the pressure of a fluid above atmospheric pressure, which is useful for understanding how much additional pressure is exerted by a fluid for various applications, such as diving or engineering calculations.

The correct choice is the measurement that signifies the difference between the pressure of a fluid and the atmospheric pressure surrounding it. This allows for a clear understanding of how much pressure is exerted by the fluid alone, excluding the effects of the air pressure above it. This is why the answer focused on the difference between water pressure and atmospheric pressure directly reflects gauge pressure.

In contrast, the pressure at sea level (14.7 psi) represents atmospheric pressure itself, not the gauge pressure that accounts for additional pressures in fluids. Atmospheric pressure on its own does not provide information about the internal pressure of a fluid system. The average pressure in a closed container involves both gauge pressure and atmospheric pressure, making it insufficient for determine gauge pressure. Thus, B is the only measurement that correctly identifies gauge pressure by highlighting the relevant differences.