A particle can infect humans and make them sick. It attaches to a host cell that injects its RNA, which is the host uses to make proteins from the particle. This particle can reproduce its own, and can only copy itself by using the machinery of the host, which explains whether a particle described, is a virus or a cell.
A. The particle is a sub because it has genetic information and attaches to other cells.

B. The particle is a cell because it does not make proteins and cannot reproduce its Self.

C. The particles of virus because it does not use energy and cannot repetitive itself.

D. The particles of virus because it has genetic information and can infect humans.