请选择DCBA4U+i)O8q'@)M+H1x-S-p(T*EWe line _____ in the playground.+q(Q)h4t:t*H1@
A. on+q(Q)h4t:t*H1@
B. of+q(Q)h4t:t*H1@
C. up+q(Q)h4t:t*H1@
D. down+q(Q)h4t:t*H1@