Which statement best describes the charges of the particles involved in the nuclear fission reaction above?

a
A positive particle is striking a neutral particle, breaking it into more positive and neutral particles.
b
A negative particle is striking a positive particle, breaking it into more negative and positive particles.
c
A neutral particle is striking a negative particle, breaking it into more neutral and negative particles.
d
A neutral particle is striking a positive particle, breaking it into more neutral and positive particles.

d

A neutral particle is striking a positive particle, breaking it into more neutral and positive particles.