Context: Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Lee is pushing on his friend's wheelchair.
According to Newton's third law, what other force must be happening?
A. The wheelchair is pushing on Lee.
B. The wheelchair is pulling on Lee.
Identify the correct choice from the options below and respond with the letter of the correct option.

A