The correct answer is D) Easier to repair and inspect. The main advantage of a split axial compressor case is that it allows for easier access and inspection of the internal components. With a split case design, the compressor can be disassembled more readily, making it simpler to inspect the blades, rotors, and other critical parts. This facilitates maintenance and repairs, as technicians can access the internal components without having to remove the entire compressor assembly. The other answer choices, while potentially advantageous in their own right, do not directly address the key benefit of a split axial compressor case, which is the improved accessibility for repair and inspection.