[单选题]
What does the phrase ‘5zeege 3xzb cb(h :)cvf4) n+y iqz:,gthe genetic code u16+c dgco8yiis universal’ mean?
A. Adenine always pairs with thymine, and guanine always pairs with cytosine
B. Almost all living organisms use the same genetic code
C. Different codons cannot code for the same amino acid
D. Proteomes are always larger than the genomes