An explosion is a rapid expansion in volume associated with an extremely vigorous outward release of energy, usually with the generation of high temperatures and release of high-pressure gases.
A release of mechanical, chemical, or nuclear energy in a sudden and often violent manner with the generation of high temperature and usually with the release of gases.
n.
A violent bursting as a result of internal pressure.
I believe it is B because for a monopoly it has no close substitute and is protected by a barrier that prevents other firms from selling that good or service
