Analytes Must Be Ionized Prior to Entering the Mass Filter

Analytes must be ionized prior to entering the mass filter in a mass spectrometer.Electron ionization and chemical ionization are two ionization techniques.Which of the following statements are INCORRECT regarding either technique?
I Electron ionization uses an electron beam to create molecular ions,M^{+ .} .
II Chemical ionization uses an electron beam to ionize reagent gas.
III Electron ionization gives very little fragmentation of the molecular ion.
IV The ionized reagent gas in chemical ionization undergoes a complex set of chemical reactions before protonating the analyte to create MH⁺.
V Both ionization techniques give identical mass spectra.

A) I,III,and V
B) III and V
C) II,III,and IV
D) I,II,and IV
E) I,II,and V