A vw bug is driving north on a striaght two lane road at a constant 38mph and a chevy impala is driving south at 29mph on the same road heading toward the vw bug (but in a different lane). What is the velocity of the vw bug relative to the chevy impala?
A. 67mph, south
B. 67mph, north
C. 9mph, north
D. 9mph, south