[单选题]
You are traveling at 55 mi/h in sl*;uro:; a klyran3f6iw 7*dthe +x axis rv-:pza/6vahhy t:v0cs 6uns 5elative to a straight, level road anth u/ph cya::66s vn5vazv0s-d pass a car traveling at 45 mi/h. The relative velocity of your car to the other car is