[单选题]
You are moving at 120 km/h toward a stationaf-1k,phm0 p;lh dkv x*ry tr xu+ llyc7 x;dryt1*sg3l+/eeain. The train blows its 400-Hz whistle. y +c1s;*x3txg7d/eyreulll +Take the speed of sound to be 340 m/s. What frequency do you hear?
A. $444 \; Hz$
B. $439 \; Hz$
C. $364 \; Hz$
D. $361 \; Hz$
