Step 1: Concept Investment casting, or the "lost wax" process, is used for parts requiring extreme dimensional accuracy and intricate detail.
Step 2: Meaning A wax pattern is coated in a refractory ceramic slurry to create the mould.
Step 3: Analysis This process allows for complex shapes and fine surface finishes that other sand-casting methods cannot achieve.
Step 4: Conclusion Due to the precision required for dental crowns and inlays, investment casting is the preferred method.
Final Answer: (C)