The mass spectrum for compound X shows M, M+1 and M+2 peaks, and there are other peaks as well. Peak M is the molecular ion peak, $\text{M}^+$. The relative abundance of peak M is fifteen times that of peak M+1. Peaks M and M+2 have the same height. Which compound could X be?
- A1-chloro-2,2-dimethylpentane
- B2-chloro-3-methylpentane
- C2-bromo-2-methylhexane
- D3-bromo-2,2-dimethylbutane