MC 1.5 Homework . Unanswered . Due Feb 9th, 8:00 AM The PPC is downward sloping to represent (choose all that apply) 1 Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation... SHOW MORE ~ a there there is a trade off between two goods or two groups of goods. b the law of increasing opportunity cost. C that there is no such thing as a free lunch. d that resources are limited. e that not all resources are equally productive in the production of all goods. 7 OPE Unanswered . 1 attempt left Submr