A home owner wishes to build an enclosed porch adjoining the west end of his home. The present distance between the owner's home and the west property line is 15 feet. If the owner builds the porch, the distance to the property line will be reduced to 5 feet. However, local requirements specify at least a 10-foot setback. To legally construct his porch, the owner needs to obtain a special-use permit. A. B. to obtain a zoning variance. C. to apply for a non-conforming-use status. D. no special authorization.