Which of the Following Statements About What We Have Learned

Which of the following statements about what we have learned by comparing the modern-day human genome to other genomes is TRUE?

A) Modern humans whose ancestors come from Europe or Asia share up to 2% of their genome with Neanderthals.
B) Many of the 3 million genetic differences between the genome of two humans are the result of new mutations that have arisen within the last 2000 years.
C) The human genome is far more gene-dense than the yeast genome.
D) In syntenic regions of the human and mouse genomes, both gene order and the placements of more than 95% of the mobile genetic elements are conserved.