Answer:
A. Velocity
Explanation:
A. ✓ Velocity: It is the right answer because, as velocity, it includes speed (40 miles per hour) and direction (east).
B. ✘Instantaneous speed: It's not the right answer because it doesn't specify that's the speed any specific moment, just a general velocity value.
C. ✘Acceleration: Acceleration implies a change in velocity, which is not declared in the statement of the problem. That's why it's not the right answer.
D. ✘Average speed: Speed doesn't include direction, which is included in the statement of the problem. It's not the right answer
