18. Which one of the following description of the matter wave Ψ(x, t) is correct? (A) The probability of finding a particle at position x and time t is proportional to the value of |Ψ(x, t)|². (B) The probability of finding a particle at position x and time t is proportional to the value of |Ψ(x, t)|. (C) The probability of finding a particle at position x and time t is proportional to the value of Ψ(x, t). (D) The mass distribution of a particle at position x and time t is proportional to the value of |Ψ(x, t)|². (E) The mass distribution of a particle at position x and time t is proportional to the value of |Ψ(x, t)|.