Which of the following statements best compares reproduction in viruses with reproduction in single-celled protists?
A. Viruses require large colonies to reproduce; single-celled protists reproduce as individual cells.
B. Viruses reproduce by releasing spores; single-celled protists reproduce by dividing in half.
C. viruses form haploid gametes when they reproduce; single-celled protists form diploid gametes when they reproduce.
D. Viruses require the cellular machinery of host cells to reproduce; single-celled protists reproduce on their own.