题目内容：

[单选题]Using fiber optic cable, optical communications have enabled telecommunication （93） to be made over much greater distances and （94）much lower levels of（95）in the transmission medium and possibly most important of all, optical fiber communications have enabled much higher data rates to be accommodated

A． links B. lines C. circuits D. devices A. through B. from C. at D. with A. dispersion B. loss C. noise D. data rate