The correct answer is: B. Ridge
A ridge is the highest line of a sloping roof, where two opposite slopes meet. It is usually made of wood or metal and is covered with shingles or other roofing material.
A rafter is a structural member that supports the roof of a building. It is a long, sloping beam that runs from the top of the wall to the ridge of the roof.
A crown is the topmost part of a building, such as a castle or cathedral. It is usually decorated with turrets, pinnacles, and other architectural features.
An eave is the part of a roof that projects over the wall of a building. It protects the wall from rain and snow.