Which statements describe dark matter? Select two options.

A:It is invisible.
B:It is the same as dark energy.
C:It is well understood by scientists.
D:It does not emit electromagnetic radiation.
E:It can be observed by shifts in red and blue light

When mitochondrial dna from living relatives was compared with mitochondrial dna from the skeletons, scientisits determined that skeletons 3,4,5,6 and 7 were members of the romanov family. which of these skeletons can be identified by name based on the evidence you have? explain your answer.