Hattie lives near the airport. Planes are on flight paths over her apartment building every day. They make a lot of noise and shake her entire apartment. On the day she moved in, her heart raced the first 2 or 3 times planes passed close overhead, but that soon subsided. She also had difficulty sleeping at night the first few nights. Soon that was also no longer a problem. She is now sleeping fine, and hardly notices when the flight path takes planes over her building. Hattie's change in behavior in relation to the planes passing overhead is an example of:

A) Extinction
B) Habituation
C) Sensitization
D) Conditioning