Why Does Bromine Produces M⁺• and (M+2)⁺• Peaks of Equal

Multiple Choice

Why does bromine produces M⁺• and (M+2) ⁺• peaks of equal intensity on a mass spectrum?

A) ADVANCE \u 2^{81 ADVANCE \d 2}Br isotope has higher natural abundance than ADVANCE \u 2^{79 ADVANCE \d 2}Br isotope
B) ADVANCE \u 2^{79 ADVANCE \d 2}Br and ADVANCE \u 2^{81 ADVANCE \d 2}Br isotopes have almost equal natural abundance
C) ADVANCE \u 2^{79 ADVANCE \d 2}Br isotope has higher natural abundance than ADVANCE \u 2^{81 ADVANCE \d 2}Br isotope
D) none of these