Which statements about conservation of linear momentum are correct?

Select all that apply

• Option A

  For a block-wedge system on a smooth horizontal floor, total horizontal momentum is conserved

• Option B

  During a very short explosion, if external impulse is negligible, total momentum immediately before and after the explosion is the same

• Option C

  During an explosion, the momentum of every individual fragment remains constant

• Option D

  If a gun-bullet system is initially at rest, the gun and bullet have equal and opposite momenta immediately after firing