Possessing the Entire Sequence of a Particular Human Genome May

Multiple Choice

Possessing the entire sequence of a particular human genome may not be as useful as we think. Why not?

A) Every human genome is different enough that knowing ONE human's DNA sequence can't tell us almost anything about ALL humans.
B) It's not the DNA sequence that matters-we need to know the mRNA sequence of the human genome.
C) Due to the presence of introns/exons, and splicing of RNA after transcription, the DNA sequence doesn't necessarily tell us the exact number/type of proteins that will eventually be made from it.
D) The amount of "junk DNA" present in the human genome masks any useful genetic information that we'd like to obtain.
E) Due to the presence of introns/exons, and pre-transcriptional modification, the protein profile varies considerably among people, so it would be better to determine that.