When might an object's average velocity be equal to its average speed in two dimensions?

Question

A) If the object does not loop back to its starting position, then the average velocity will be equal to the average speed.

B) The object's average velocity will never be equal to its average speed, in magnitude or direction, because average velocity will be negative and average speed will be positive.

C) If the object moves in a straight line in one direction represented as positive, then the direction and magnitude of the average velocity will be equal to the average speed.

D) If the object moves in a straight line in one direction represented as positive, then the magnitude of average velocity will be equal to the average speed.