The most important information to be obtained from a barometer is the __________.

A
difference between the reading of the two pointers, which shows wind direction
B
last two figures of the reading of the pointer, such as .87, .76, or .92
C
present reading of the pressure, combined with the changes in pressure observed in the recent past
D
weather indications printed on the dial (such as "cold, wet, etc.") under the pointer
E