请选择CBA2U3k8_*x7{,` I am reading a letter. It’s_______ my friend, Lucy.+u-Q']8~1e*}9l.L2h/],~;l5v'v
A. from+u-Q']8~1e*}9l.L2h/],~;l5v'v
B. on+u-Q']8~1e*}9l.L2h/],~;l5v'v
C. of+u-Q']8~1e*}9l.L2h/],~;l5v'v