Which of the following three statements concerning relative humidity values of 30% and 40% are true? Note that when the relative humidity is 30%, the air temperature may be different than it is when the relative humidity is 40%.
A. It is possible that at a relative humidity of 30% there is a smaller partial pressure of water vapor in the air than there is at a relative humidity of 40%.
B. It is possible that there is the same partial pressure of water vapor in the air at 30% and at 40% relative humidity.
C. It is possible that at a relative humidity of 30% there is a greater partial pressure of water vapor in the air than there is at a relative humidity of 40%.
(a) A, B, and C
(b) Only A and B
(c) Only A and C
(d) Only B and C
(e) Only A