UC Davis vs. Cal Poly Pomona vs. UCR

<p>Which should school should I pick? I am doing business related majors for the three schools. For UC Davis I am doing managerial economics. For pomona, it's business administration. For UCR, it's pre-business. Which has the better business program? Which would open more job opportunities? How difficult is each program at each school? I hope to pursue a career as a purchasing manager/buyer for a company in the future.</p>