[单选题]
99.35: The following equatiocua)ciei o-9hhgy(11rp1)m tn k bv1( h5u,jejis an example 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
