Which of the following is NOT one of the steps of the PCR cycle? A. The sample is heated to about 95 oC to separate the strands, so they can be replicated. B. The sample is cooled to about 500C, and the primers can bind to the single DNA strands. C. The sample is heated to 72 oC, and DNA polymerase synthesizes new copies of DNA. D. The sample is cooled to about 10 oC to deactivate the DNA polymerase until the next step is ready.