A person tried to push a refrigerator across the kitchen. She applies as much force as possible, but she cannot make the refrigerator move. Which statement BEST describes why the refrigerator does not move?
a
She applies too much force to the refrigerator, and now the forces are unbalance.
b
She applies too much force to the refrigerator, and now the forces are balanced.
c
She does not apply enough force to the refrigerator, so the forces are unbalanced.
d
She does not apply enough force to the refrigerator, so the forces are balanced