During the dinner, a lady’s critical comments on my new dress really left me . After an aw

During the dinner, a lady’s critical comments on my new dress really left me . After an awkward silence, I only sat there embarrassed.
A. in a mess
B. in a dilemma
C. at a loss
D. at random

A. in a messB. in a dilemma(答案→)C. at a lossD. at random解析：A. in a mess混乱，一团糟，B. in a dilemma处于进退两难的境地，C. at a loss不知所措， D. at random随意地，句意：在晚餐的时候，一个女士对我的裙子的批评话使我不知所措，经过一段尴尬的沉默后，我只是窘迫的坐在那里。选C。

谢谢了