Which crop is ideally suited and was grown in the 17th-18th centuries in the region which received 40 inches or more of rainfall a year?

Rice

The correct answer is Option 3- Rice

The abundance of land, available labour and the mobility of peasants were three factors that accounted for the constant expansion of agriculture. Since the primary purpose of agriculture is to feed people, basic staples such as rice, wheat or millets were the most frequently cultivated crops. Areas which received 40 inches or more of rainfall a year were generally rice-producing zones, followed by wheat and millets, corresponding to a descending scale of precipitation.