Which statement is true? O The core is the set of all Pareto-optimal allocations that are welfare-improving for both consumers relative to their own endowments. O The core is the set of Pareto-improving allocations for both consumers relative to their own endowments O The core is the set of all feasible allocations O a and b are both correct D Question 7 1 pts If an allocation is Pareto optimal and indifference curves can be represented by various Cobb-Douglas utility functions O two consumers must have the same MRS at the optimal allocation, but consumers may consume the goods in different ratios. O two consumers with the same income must have the same MRS at the optimal allocation. but if their incomes differ, their MRSs may differ. O two consumers must consume both goods in the same ratio. O both a and b are correct