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:
Dean is pulling on a full suitcase.
According to Newton's third law, what other force must be happening?
A. The suitcase is pushing on Dean.
B. The suitcase is pulling on Dean.
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

B