What Are the Predicted M/z Values (Masses) and Relative Heights

Multiple Choice

What are the predicted m/z values (masses) and relative heights of all the molecular ions of 1-bromoethane that would appear on a mass spectrum (excluding peaks produced by ¹³C and ²H) ?

A) M⁺ peak at m/z=108 and an M+1 peak at m/z =110
The M+1 peak is approximately 1/2 the height of the M+ peak.
B) M⁺ peak at m/z= 79 and an M+1 peak at at m/z = 81
The M+1 peak is approximately the same height as the M+ peak.
C) M⁺ peak at m/z = 108 and an M+2 peak at m/z = 110
The M+2 peak is approximately the same height as the M+ peak.
D) M⁺ peak at m/z = 108 and an M+2 peak at m/z = 110
M+2 peak is approximately 1/2 the height of the M+ peak.
E) M⁺ peak at m/z = 79 and an M+1 peak at m/z = 81
The M+1 peak is approximately 1/2 the height of the M+ peak.