Context: Megan is sitting on a roller coaster cart as it reaches the bottom of a big loop. Earth's gravity is pulling down on Megan with a force of 600N. The seat of the cart is pushing up on Megan with a force of 1,200N.
Assume all other forces on Megan are balanced. Which statement describes the forces on Megan?
A. The forces are balanced, so there is no net force on Megan.
B. The forces are unbalanced, so there is a net force on Megan.
From the given choices, select the correct answer and reply with the letter of the chosen option.

B