Final answer:
Marco, as a conservative on social issues, would most likely agree with option C: State governments should increase funding for school-choice programs.
Step-by-step explanation:
Based on the information provided, Marco, as a conservative on social issues, would most likely agree with option C: State governments should increase funding for school-choice programs. Conservatives generally prioritize limited government intervention and support policies that promote individual choice and autonomy. Increasing funding for school-choice programs aligns with these principles as it allows parents and students to have more options in education.