Jose gets up from his seat on the bus to move closer to the front. Just as he begins

Jose gets up from his seat on the bus to move closer to the front. Just as he begins to walk forward, the bus stops at a light. What is the best explanation of what happens to Jose?

While Jose is walking, his body is in motion, but as the bus stops, it exerts a force on Jose opposite to the direction he is walking, causing him to stop as well.

While Jose is walking, his body is in motion, but when the bus stops, an unbalanced force accelerates his body backward.

While Jose is walking, he is in motion due to the force of repulsion. When the bus stops, he is catapulted forward due to the bus's stronger force of attraction.

While Jose is walking, his body is in motion, but when the bus stops, he continues to move forward due to inertia.