from The Economic Report of the President

Question

However, experience within the past year has demonstrated, on a small scale, some of the dangers that may result from holding the support level
for any commodity too high.
(from "The Economic Report of the President" by President Harry S. Truman)
What does the word commodity mean?
1. something expensive
2. something complicated
3. something that can be purchased
4. something that can be difficult to obtain

Answer 1

3. something that can be purchased