Hot Standby strategy in Oceanstor 1800 is set to high, all using 1TB hard disk, when in the hard disk domain respectively have 8 pieces of hard disk,80 pieces of hard disk,180 pieces of hard disk and 280 pieces of hard disk, how much hot spare space will the system assign respectively? (Unit: TB)
A . 1, 7, 8, 9
B . 1, 7, 15, 24
C . 1, 4, 8, 8
D . 1, 5, 7, 8
Answer: D