单项选择题

Scientists have developed glass fibers as thin as human hair which are designed to carry light signals.()

A．科学家发展出一种玻璃纤维，轻得像人的头发丝一样，可以用来设计轻型的信号装置。
B．科学家制造出一种玻璃纤维，比人的头发丝还细，这种设计是用来传递光信号的
C．科学家开发出像人的头发一样细的玻璃纤维来传输光信号。
D．科学家研制出跟人的头发丝似的玻璃纤维，用在光导信号的设计上。

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