Two people are pushing a couch from the same side. One person pushes with a force of 2 N. The other person pushes with a force of 4 N.

a) The couch will move with a force of 8 N.
b) The couch will move with a force of 2 N.
c) The couch will not move.
d) The couch will move with a force of 6 N.

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