What are the best starting material and reagents needed to make N-methylpropanamide?
a. Propanol and H₂CrO₇
b. Propanoic acid, methylamine
c. Propanoic acid, methylamine, and high heat
d. Propene, H₂SO₄, H₂O, and high heat
e. Methanoic acid, propylamine, and high heat