Please direct my inquiry（ ）whoever is in charge of quality contr

Please direct my inquiry（ ）whoever is in charge of quality control.
A、with
B、for
C、to
D、on
【正确答案】：C
【题目解析】：介词的特殊用法。direct to：把（注意力、精力）贯注在...上 ，whoever is in charge of quality control整体做介词to的宾语。