Select items that affect incentives for people to produce and exchange goods and services. 1.liability rules. 2.property rights. 3.contract enforcement. 4.standards for weights and measures

"Contract enforcement" is the one item among the choices given in the question that affect incentives for people to produce and exchange goods and services. The correct option among all the options that are given in the question is the third option or option "3". I hope that the answer has helped you.