Concept:Molasses is a dark, thick by-product obtained during the extraction of sugar from certain crops.
Explanation:During sugar production, the juice is boiled and sugar crystals are separated.
The thick, dark syrup left behind after repeated crystallisation is called molasses.
Sugarcane is the major commercial source of both sugar and molasses.
Other crops like pineapple, cassava, and sorghum do not typically yield molasses as a major by-product.
In sugar industries, molasses is widely used for making alcohol, animal feed, and industrial products.
Answer:C. sugarcane