HELP ME ASAP PLS!!

PLUMBING Salvatore is a plumber. He charges $100 for all work that is completed in less than 2 hours. He charges $250 for work that requires 2
to 5 hours, and he charges $400 for work that takes between 5 and 8 hours.
Which best describes the domain of the function that models Salvatore's price scale?
O A) The domain is {100, 150, 400}.
OB) The domain is {z 0 < x < 8}.
C) The domain is {z 100 < x < 400}.
OD) The domain is {zz = 2, 5, 8}.