题目选项分析

Nanotechnology may pose risks in the coming decades as we find it increasingly commonplace to introduce small robots into our bodies. But the fact that these robots might be invisible to the naked eye doesn't mean we are helpless against them. After all, since the initial development of germ theory, we have designed and continuously improved upon ways to protect ourselves from a variety of germs.

In the passage, the author develops the argument by

【选项】

using an analogy with a known phenomenon to draw a conclusion about an unknown phenomenon