When using the ideal gas law, which of the following rules must be obeyed? (a) Always use

Question:

When using the ideal gas law, which of the following rules must be obeyed?
(a) Always use temperature in kelvins and absolute pressure.
(b) Always use volume in m3 and temperature in kelvins.
(c) Always use gauge pressure and temperature in degrees Celsius.
(d) Always use gauge pressure and temperature in kelvins.
(e) Always use volume in m3 and gauge pressure.