I WILL MARK BRAINLEST! PLEASE GVE AN ANSWER
Trevor watched as the barometer on his front porch showed a change in air pressure.
What happened as Trevor was watching the air pressure change?
A) A low pressure system turned into a high pressure system.
B) A high pressure system moved into the area.
C) A low pressure system moved into the area.
D) A high pressure system turned into a low pressure system.