Matthew Decides to Try an Experiment to See How People

Matthew decides to try an experiment to see how people react when he walks beside them, slowing his pace when they do and speeding up when they do.What is likely to be a common reaction to Matthew's experiment?

A) The person he is walking beside will give him strange looks and ask him what he is doing.
B) The person will not even notice what Matthew is doing.
C) The person he is walking beside will begin to mimic his behaviour.
D) The person will stop walking altogether, then turn and walk in the opposite direction.