Final answer:
The constitutional provision that made cooperative federalism possible is the elastic clause, which grants the national government the power to make all necessary and proper laws. This provision allows the government to address new situations and challenges that may arise over time.
Step-by-step explanation:
The constitutional provision that made cooperative federalism possible is the elastic clause found in Article I, Section 8, of the Constitution. This clause, also known as the necessary and proper clause, grants the national government the power to make all laws that are necessary and proper for carrying out its constitutional responsibilities. It allows the national government to have flexibility in addressing new situations and challenges that may arise over time.
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