Which of the following contains only one type of macromolecule?
i. RNA viruses
ii. DNA viruses
iii. Prions
iv. Viroids
v. RNA and DNA viruses
A. (i), (ii), (iii), (iv), and (v)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i), (iii), and (v)
E. (i) and (iv)