[单选题]
Is the following decay permissible3laj (hljtk9fh5m s*dej8*q j-msc 91? sm4vb y 13fzvv-yjo3c ;se84 li8 5pjq$\Sigma^+ \rightarrow \Lambda^{\circ} \;+\; \pi^+$
A. yes
B. No, because charge is not conserved.
C. No, because mass is created.
D. No, because lepton number is not conserved.
