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While inspecting the genome sequence of your newly discovered organism, you note that while the genome overall is 50% G + C, there is a cluster of genes comprising about 20,000 bp that is 64% G + C. The best explanation for this is:____________A) this represents normal variation within a chromosome.B) the 20,000 bp segment likely contains a cluster of housekeeping genes.C) the 20,000 bp segment is an adaptation to a more thermophilic environment.D) the 20,000 bp segment is a recent acquisition via horizontal gene transfer.