Consider cis-1-tert-butyl-4-methylcyclohexane. Take the A-value of CH${}_3$ as $7.3\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$ and that of tert-butyl as much larger. Which statement is correct?

1. AIn the preferred chair both groups are equatorial; the cis isomer is more stable than the trans isomer
2. BIn the preferred chair the tert-butyl group is axial and the methyl is equatorial
3. CIn the preferred chair the tert-butyl group is equatorial and the methyl is axial; the cis isomer is about 7 kJ/mol less stable than the trans isomer
4. DIn the preferred chair both groups are axial; the cis isomer is more stable than the trans isomer