When the temperature of the gas changes from cold to hot, the amount of pressure is

a.) decreasing
b.) increasing
c.) stays constant
d.) none of the above

 Assuming constant volume, if you increase temperature, the pressure will increase. So it is B: increasing

Assume that the gas being referred to above is ideal such that by Gay - Lussac's Law: 
                                  T1P2 = T2P1
Thus, increasing the value of the temperature, would also correspond to an increase in the value of the pressure. This is because the molecules are moving faster at a higher temperature.