The sled will stop because of friction between the ground and the sled
I recommend you to use socractic
Science says that dead stars become neutrons when they die. Neutron stars are characterized by having a small radius with a high density. Protons and electrons are compressed in a very tight space making it highly dense. As it gets more compresses, it causes implosion in the form of shockwaves called supernova.
So the correct answer is C.
Hope this helped