When dna replicates select one: a. transcription factors determine where to begin dna replication. b. the original dna unwinds, and multiple copies of a region are transcribed before the dna closes back up. c. the original dna is not affected and a new double-stranded dna is made from two new strands of dna. d. a cell that was diploid (2n) will now be tetraploid (4n). e. one strand of the original dna ends up in each of the new dna molecules?