Viruses are infectious agents that can infect a variety of living organisms, from bacteria to humans.
They have a very simple structure, they are indeed "bundles of genetic material in a protein casing". Therefore, D is correct.
But they are not classified as cells, not being unicellular nor multicellular organisms; So E is incorrect.
As viruses are not classified as cellular organisms, they do not belong to any of the five kingdoms of life. Therefore, C is incorrect as well.
As viruses do not present a structure complex enough for that, they can't replicate by themselves or obtain energy by themselves. They need a host to survive and to replicate. So, A and B are correct.
Therefore, the answers that apply are A, B and D.