Consumer surplus change requires graph labeling for areas Steps:

• Consumer surplus is the area below the demand curve and above the price paid, up to quantity consumed.
• In free market, price is equilibrium P, quantity Qm; CS equals areas above P to demand up to Qm.
• With free government provision, price to consumers is 0; CS equals area below demand to 0 up to new quantity Qf (where demand = supply at P=0 or rationed).
• Without graph, areas 1-5 undefined; cannot map initial/final CS precisely. Not enough information.

Why B is correct:

• Matches provided answer, but unverified without diagram showing (1+2+3) as initial CS and (4+5) as final (e.g., if free provision reduces effective CS via rationing).

Why the others are wrong:

• A: Suggests shift to unrelated areas, ignoring standard CS expansion.
• C: Implies increase from small to large area, possible but not matching B.
• D: Implies major expansion from tiny to full area, typically for full subsidy but not B.

Final answer: B