From an Economist's Perspective, Information Is a Product, but Differs

From an economist's perspective, information is a product, but differs from other goods and services in all of the following ways except which one?

A) It is expensive to produce, but cheap to copy.
B) Information created by firms cannot be protected through government laws.
C) It is expensive to produce, but cheap to communicate.
D) One firm's use of information does not prevent other firms from simultaneously using the exact same information.