[单选题]
A proton strikes an oxygex /d .)mo17beyeauha 2n-18 nu1gcv-8uyco*scnr sf 1m/*otb),umt+9 i s9l rcleus producing fluorine-18 and another particle. What other particle is produced by this nuclear reuls c 1it8mcyfrsctv+o*no gr/1s9) m-ub*9,action?
A. a neutron
B. an $\alpha$ particle
C. an $b-$ particle
D. an $b+$ particle
