A differentiating cell turns on (starts transcribing) an entire group of genes that are all required in red blood cells (Genes M, N, O P). Which of the following are possible explanations for the mechanisms that contribute to this observation? (select all that apply) Genes M,N,O,P are all regulated by the same cis regulatory element Genes M, N, O. P are all regulated by the same transcriptional activator Genes M, N, O, P are all regulated by the same repressor that just got degraded The DNA for Genes M, N, O, P has just been added to the cell by the process of commitment The cell is in the process of becoming a neuron Genes M, N, O, P are produced from 1 common transcript by alternative splicing.