Which one of the following is most parallel to the "free rider" effect mentioned? A. An industry agrees to base itself in a city where there has been little industrial development only if the city will rezone the specific property the industry desires. B. Because fares for public transportation are rising, a commuter decides to bicycle to work rather than to use public transportation in a city where auto emissions are a problem. C. An apartment dweller begins to recycle newspapers even though no one else in the building does so and recycling is not required by law. D. In an area where groundwater has become polluted, a homeowner continues to buy bottled water rather than contribute to a neighborhood fund to combat pollution. E. In an area where overgrazing is a severe problem, a shepherd allows his sheep to continue grazing common field even though his neighbors have agreed to buy feed for their animals until regrowth occurs.