Which of the Following Describes the Asymmetry Mancur Olson Observed

Which of the following describes the asymmetry Mancur Olson observed in the incentives to support and oppose trade policy?

A) The benefits of those seeking protection outweigh the costs imposed by the protection.
B) The benefits of protection are spread out over a large number of firms and industries, but the costs are concentrated on consumers.
C) The benefits of policy are concentrated, and the costs are spread out over a large number of participants.
D) The costs of protection are concentrated on a few firms, and the benefits of protection are spread out over a large number of consumers.