Which of the following statements about free radicals are correct?

1. AThe benzyl radical has unpaired-electron density at the ortho and para ring carbons as well as at the benzylic carbon
2. BThe allyl radical has three electrons in its pi system
3. CA tertiary alkyl radical is more stable than a primary alkyl radical because of hyperconjugation
4. DThe vinyl radical, ${\mathrm{CH}{}_2=\mathrm{CH}}^{\bullet }$, is more stable than the ethyl radical because the radical carbon is sp2