Scientists' understanding of viruses has advanced greatly in the last fifty years. Which statements give evidence to support the classification of viruses as nonliving? Choose all the statements that apply
A Viruses are made up of proteins, nucleic acids, and sometimes lipids
B. Viruses do not respond to changes in the environment around them.
C. All viruses are parasites and depend entirely upon living cells for their existence.
D. Viruses must infect living cells in order to reproduce.