Which particle$($s$)$ is$($are$)$ emitted when ${?}_{19}^{10}K$ decays into ${?}_{20}^{40}Ca?$

A$)$ an alpha particle

$($D$)$ a proton

B$)$ an electron and an antineutrino

E$)$ a photon

C$)$ a positron and a neutrino