[单选题]
99.35: The following equation u;wk+32 r uvkris an eurd*q3 kw,1zhn +qr (dxample of what kind of nuclear reaction?
$_{92}^{235}U$ + $_0^1n$ → $_{51}^{133}Sb$ +$_{41}^{99}Nb$ + $4\:_0^1$n
A. fission
B. fusion
C. alpha decay
D. beta decay
E. positron decay
