Question

Which of the following could be units of speed? A. m B. m/s C. m north D. degrees north

Answer 1

Since velocity is vector quantity, it'll depend on both direction as well as magnitude hence options C and D are rejected.
Speed = distance/time 
Therefore, unit of velocity is m/s.

Answer 2

B. M/s because north is to to with locating areas degrees north is temperature and speed is not measure in meters