Based on the reading, upton sinclair would most likely agree that the government must have a role in:

Upton Sinclair was an American writer who is famous for his novel "The Jungle" (1906), which depicted the poor sanitary and labor conditions under which the people in the meatpacking industry worked. This book caused major public outrage. As a response to this, the government would eventually pass the Pure Food and Drug Act and the Meat Inspection Act, both in 1906. This formalized the role of the government as a regulator in this industry.

all choices are correct

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.