What is the difference between range rate and bearing rate on radar?

What is the difference between range rate and bearing rate on radar?

• A. Range rate is the rate of change of distance to a target; bearing rate is the rate of angular change.
• B. Range rate is the rate of angular change; bearing rate is the rate of distance change.
• C. Range rate is the radial speed; bearing rate is the tangential speed.
• D. Range rate and bearing rate describe the same motion.

Answer: (A)