The incomplete table below shows selected characteristics of gas laws.

Name
Variables
Constants
Equation
?
?
?
PV = k
Charles’s law
?
?
V = kT
?
Temperature, pressure
?
P = kT
Combined gas law
Pressure, temperature, volume
?
?

Which constants would most likely be filled in the first row of the table?
temperature and moles of gas
volume and temperature
pressure and volume
pressure and moles of gas