Which of the following:

Means ushering
Is the opposite of the definition of ushering
And is nothing of the remaining definition

A) Pushing, leading

B) Slowing, Dragging

C) Blocking

B) Slowing, Dragging

The correct option in this case would be:

C) Blocking

This is because blocking is the opposite of ushering, and it is also not related to the remaining definition of pushing or leading.