The Graph Below Shows the Atmospheric Pressure, in Millibars of Mercury

Multiple Choice

The graph below shows the atmospheric pressure, in millibars of mercury, as a function of altitude in meters.According to the graph, which of the following sentences best describes the relationship between pressure and altitude? ​ ​
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A) Pressure decreases with altitude, but at higher altitudes a small change in altitude makes relatively little difference in pressure.
B) Pressure decreases at an increasing rate as altitude increases.
C) Pressure is concave down with respect to altitude.
D) As altitude increases pressure does not change.