Which can we learn from the movie Hachi：A Dog‘s Tale？

Which can we learn from the movie Hachi：A Dog‘s Tale？
A.Hachi followed Mr.Parker to his office.
B.Mr.Parker had to walk Hachi back home.
C.Hachi caught up with Mr.Parker at the station.
D.Hachi dug a hole and came out from beneath the fence.
正确答案：Mr.Parker had to walk Hachi back home.