22. For a 2D monatomic ideal gas, which of the following statements is true?
(A) The probability density function of finding particles of the velocity of =

is not only lincarly proportional to the Boltzmann factor

but also linearly proportional to y.
(B) The probability density function of finding particles of the speed of v is only linearly proportional to the Boltzmann factor

(C) The probability density function of finding particles of the speed v is not only linearly proportional to the Boltzmann factor

but also lincarly proportional to v.
(D) The probability density function of finding particles of the speed of v is not only linearly proportional to the Boltzmann factor

but also linearly proportional to v2.
(E) None of the above is true.