题目内容

Why does the author say that “this is the tip of the iceberg” in the last paragraph?

A. Because to create smart textiles is as tough as breaking iceberg.
Because more and more companies and designers will create smart textiles and develop technology in the future.
C. Because designers are reluctant to develop the technology.
D. Because the designers and companies need to extract the essential substances for the smart textiles from the iceberg.

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