[单选题]
A proton strikes an oxys2q0pju.*vcjv2u 7khrv 8 ;tqg/ 3 leegen-18 nucle ,u ajdd 9f6kg/;n rifwsp(/d3us producing fluorine-18 and another particle. What otd9;n (auskpdjw/ fg ,rf36/id her particle is produced by this nuclear reaction?
A. a neutron
B. an $\alpha$ particle
C. an $b-$ particle
D. an $b+$ particle
