surely that means their payoff could be even bigger.

population has literally NOTHING to do with this.

irrig is ONE OF the largest costs. What if harvesting is another and distributing is another. How do we know which one is largest? Perhaps irrig is the smallest of those large costs.

Here and elsewhere I find the "show question" button doesn't work.

Thank you for saying "from whom" when referring to plants <

feed heat is not the same as producing heat, so why is B wrong. Cost of equipment has nothing to do with bills so why is C right?