Which of the following distinguishes how large supermarket chains are able to provide the public with fruits and vegetables for lower costs?

Large supermarket chains usually buy food from overseas, which is generally cheaper than buying local foods.
Large supermarket chains can negotiate prices because they have such a strong presence in the agricultural community.
Large supermarket chains always provide the customer with the best prices, even if it means sacrificing their own profits.
Large supermarket chains often buy food from farms that use cheap and unsustainable farming practices.