The highway department of a rural county found that a mountain road had a higher-than-average fatality rate for motorists. In an attempt to reduce the fatality rate, the highway department spent a portion of its reserve fund to resurface the road and build stronger barricades. Unfortunately, as most of the accidents were due to the sharp curves of the mountain road rather than an uneven surface or inadequate barricades, the fatality rate did not decrease after the highway department's work.
Which of the following courses of action could the highway department take in order to lower the fatality rate on the mountain road?
a. Replace the department's reserve fund while further analyzing the accidents and traffic problems of the mountain road.
b. Rebuild some parts of the road so that it will be straightened.
c. Require registered motorists in the county to take a drivers safety course.
d. Lower the speed limit on the mountain road and hire extra policemen to enforce the new limit.
e. Build an alternative route that would relieve traffic pressure on the mountain road.