Compare processor-based sensor systems with discrete (hard-wired) sensor logic.

• A. Processor-based systems rely solely on hard-wired relays.
• B. Processor-based systems use software only for data collection, with no logic.
• C. Processor-based systems use software to process data (PLCs or microcontrollers), enabling complex logic; discrete systems rely on hard-wired relays/contacts for simple logic.
• D. There is no difference between them.

Answer: (C)