Which of the Following Describes a Procedural Step in Reverse

Which of the following describes a procedural step in reverse transcriptase polymerase chain reaction (RT-PCR) ?

A) RNA is converted to complementary DNA (cDNA) using the enzyme reverse transcriptase
B) DNA is amplified using reverse transcriptase enzyme
C) RNA is cut into smaller fragments using the enzyme reverse transcriptase
D) None of the above
E) All of the above