in evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following observations provides the most convincing support for hypothesis?

a) there are more types of RNA than there are DNA
b) RNA contains combined catalytic, structural, and genetic storage functions
c) single-stranded RNA is less structurally complex than double stranded DNA
d) viruses contain RNA as generic material are
among the oldest forms of life on earth

i think it is c