How is a knowledge asset different from a physical$$ one?

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Part $1$

A$.$

The value of knowledge decreases as more people share it via their communities of practice.

B$.$

There is no difference because a physical asset contains a knowledge asset.

C$.$

Knowledge is not subject to the law of diminishing returns as physical assets are.

D$.$

Knowledge cannot be sold.

E$.$

Knowledge is a tangible asset that depreciates over time.