Which of the Following Statements About Dark Matter in the Galaxy

Which of the following statements about dark matter in the Galaxy is FALSE?

A) Most of it cannot at present be observed with our telescopes (we only know its existence from the gravity it exerts)
B) While the dark matter cannot be observed with our present-day instruments, we still have a pretty good idea what it consist of
C) Our measurements suggest that there may be as much as ten or twenty times more dark matter in the Galaxy than the matter we have been able to observe
D) Dark matter appears to be distributed in a giant halo (outer layer) around the Galaxy
E) We can pretty much rule out the idea that the dark matter is made mainly of vast clouds or regions of hydrogen gas