Fundamental particles — practice question

Which statement gives a description of $\beta^-$ decay in a simple quark model?

• AA down quark changes to an up quark and emits an electron and an electron antineutrino.
• BA down quark changes to an up quark and emits a positron and an electron neutrino.
• CAn up quark changes to a down quark and emits an electron and an electron antineutrino.
• DAn up quark changes to a down quark and emits a positron and an electron neutrino.