Leptin acts to prevent hypothalamic secretions of neuropeptide Y, a potent feeding stimulant. As a result, the levels of neuropeptide Y are most probably:
A. reduced in the Ob2 but not in the Ob1 strain of mice.B. reduced in both the Ob2 and the Ob1 strains of mice.C. elevated in the Ob2 but not in the Ob1 strain of mice.D. elevated in both the Ob2 and the Ob1 strains of mice.