Match the Steps of Two Rounds of PCR with an Appropriate

Short Answer

Match the steps of two rounds of PCR with an appropriate description. ​
-The mixture is heated, and the double-stranded DNA separates into single strands. When the mixture is cooled, some of the primers base-pair with the DNA at opposite ends of the targeted sequence.
A)A
B)B
C)C
D)D
E)E