During the electrophilic addition of hydrogen bromide, HBr\text{HBr}HBr, to but-2-ene to form 2-bromobutane, covalent bonds are both broken and formed. Which statement correctly describes the total number and types of bonds broken and formed in this reaction?
Bonds broken: only one π\piπ bond; Bonds formed: two σ\sigmaσ bonds
Bonds broken: one π\piπ bond and one σ\sigmaσ bond; Bonds formed: one π\piπ bond and one σ\sigmaσ bond
Bonds broken: one π\piπ bond and one σ\sigmaσ bond; Bonds formed: two σ\sigmaσ bonds
Bonds broken: two σ\sigmaσ bonds; Bonds formed: one π\piπ bond and one σ\sigmaσ bond
