An object moves a distance of 10 meters in 5 seconds. What is the average speed of the object?

The average speed of an object is calculated by dividing the total distance traveled by the amount of time taken. In this case, the object moves a distance of 10 meters in 5 seconds. Therefore, the average speed is 10 meters / 5 seconds, which equals 2 meters per second.

Hence, the correct answer is d) 2.0 m/s.