Haloarchaea often have genomes with high GC content because Choose one: A. GC base pairs help keep the DNA helix intact in the high-salt environments where haloarchaea are found. B. GC base pairs are more stable in the high-temperature environments where haloarchaea are found. C. more GC bases lead to more acidic proteins. D. GC base pairs are less stable than AT base pairs and allow for easier DNA unwinding for replication.