The customers objected unfairly in the course of shopping.
A. to be treated
B. their being treated
C. to being treated
D. having been treated
网友回答
A. to be treated
B. their being treated
(答案→)C. to being treated
D. having been treated
解析：考察object的用法，object to doing sth意为反对……，
句意为，顾客反对在购物的过程中被不公平对待 。