3-Methylbut-1-ene reacts with $\mathrm{HBr}$ with and without peroxide. Which statements are correct?

1. AIn the peroxide path, the secondary radical rearranges by a hydride shift to a tertiary radical
2. BIn the peroxide path, the secondary radical abstracts H from HBr in a propagation step
3. CWithout peroxide the major product is 2-bromo-2-methylbutane
4. DWith peroxide the major product is 1-bromo-3-methylbutane