Final answer:
The necessary and proper clause actually expanded the power of the national government, making the first statement false. Dillon's Rule states that local governments have limited powers, making the second statement false. Colonial governors did indeed have veto power over assemblies, making the third statement true.
Step-by-step explanation:
The statement that the necessary and proper clause has had the effect of limiting the power of the national government is false. In reality, the necessary and proper clause, also known as the elastic clause, has allowed Congress to exert powers not specifically enumerated in the Constitution, thereby expanding its capacity to legislate broadly.
Regarding Dillon's Rule, the statement that it gives local governments the freedom and flexibility to make decisions for themselves is false. Dillon's Rule is actually a principle that states local governments are limited to the powers expressly granted to them by the state government or those that are necessary for the locality's existence and functioning.
In colonial times, the proposition that colonial governors possessed the right to veto legislation passed by the colonial assemblies is true. This veto power was part of the colonial governance system, allowing governors to control the laws passed by the assemblies.