A member of Congress is feeling pressure to get re-elected, so they’re deciding between two programs. Option A: Airport Security: it costs $50 million and saves 10 lives
Option B: Lead Cleanup: it costs $70 million and saves 12 lives

What is the marginal benefit (MB) and marginal cost (MC) of the airport security, compared to the lead cleanup?

A) MB=$20 million; MC=2 lives lost
B) MB=2 more lives saved; MC=$20 million
C) MB=12 lives saved; MC=$70 million
D) MB=10 lives saved; MC=$50 million