34. let a (r+ip) nd al a (r- ip) be v2 v2 the lowering and raising opcratorn of n simple harmonic oscillator in units where the mass, angular frcquency and h ha

34. Let a (r+ip) nd al a (r- ip) be V2 V2 the lowering and raising opcratorn of n simple harmonic oscillator in units where the mass, angular frcquency and h have been set to unity. It 10) is the ground state of the oscillator and Ais a complex constant, the expectation valuc of (ylr lP) 1n the stte hp) m exp(Aal-.a)0), is (A) 1al (B) I +1P (C) ') V2i (D) +) V2