Naturally occurring bromine consists of two stable isotopes, \(^{79}\text{Br}\) and \(^{81}\text{Br}\), with approximate percent abundances of \(50.0\%\) and \(50.0\%\), respectively. A sample of pure diatomic bromine gas, \(\text{Br}_2\text{(g)}\), is analyzed using mass spectrometry under ionization conditions that produce the intact molecular ion, \(\text{Br}_2^+\). Which of the following mass spectra best represents the molecular ion region (\(m/z = 156\) to \(164\)) for \(\text{Br}_2^+\)?