In Which Case Is the Political Process Most Likely to Result

In which case is the political process most likely to result in the acceptance of efficient projects and rejection of inefficient projects?

A) The benefits are highly concentrated, and costs are widespread among voters.
B) The costs are highly concentrated, and the benefits are widespread among voters.
C) Both the benefits and costs are widespread among voters.
D) The benefits accrue primarily in the future, while the costs are more visible during the current period.