I would say c but check with your book jus in case
Salutations!
What do tobacco, cotton, and rice have in common?
Tobacco, cotton and rice are all cash crops. That is what makes them common. They are cash crops because the transporters had no difficulty in transporting them due to many waterways.
Hope I helped!
Wartime production and goals at home
http://www.polytechpanthers.com/ourpages/auto/2012/1/24/45532409/ItalyandGermanyafterWWI.pdf
