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.