Select all the differences between DNA and RNA.

a
RNA contains one strand of nucleotides, and DNA has two.
b
DNA contains two strands of nucleotides, and RNA has four.
c
In RNA, thymine is replaced by uracil.
d
DNA is contained only within the nucleus and RNA is not.
e
RNA is more complex than is DNA because of its multiple forms.
f
In DNA, guanine is replaced by uracil.