This firm is a _______ private c

This firm is a _______ private company of import and export merchants,_______ in 1
A、high, registered
B、height of, to register
C、highly, registered
D、highest, to register
【正确答案】：C
【题目解析】：highly修饰private，句意：本商行是一家高度私营的进出口商行，注册于