Which of the following statements is not true?

a. rna has two strands of nitrogenous bases.
b. the sugar in rna is ribose.
c. rna contains uracil instead of thymine.
d. rna carries out the instructions coded in dna.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?