Final answer:
The founding fathers designed the Constitution to protect their economic interests through exclusive control over taxation powers, the creation of a strong central government, and the inclusion of property rights and protections.
Step-by-step explanation:
The founding fathers designed the Constitution to protect their own economic interests through a variety of measures. Firstly, by ensuring control over taxation powers, they could manage economic policy to their advantage. Moreover, the establishment of a strong central government allowed for a united economic front and the making of extensive national policies. Lastly, through the incorporation of property rights and protections in the Constitution, they safeguarded their own vast economic assets and investments. Therefore, the correct answer to how the founding fathers designed the Constitution to protect their own economic interests is d) All of the above.