# Science Help Not sure

posted by
**Emmanuel**
.

Within the Gaetz Lake Sanctuary in Red Deer, Alberta, is a looped trail that is 4 km long. Suppose a person walked all the way around the looped trail in 1 h, ending where he or she started. Which statement best describes this personâ€™s motion over this time interval?

A.The person moved with an average speed of 0 and an average velocity of

+ 4 km/h.

B.The person moved with an average speed of - 4 km/h and an average velocity of - 4 km/h.

C.The person moved with an average speed of 4 km/h and an average velocity of 0.

D.The person moved with an average speed of 4 km/h and an average velocity of + 4 km/h.