What is the effect of inserting a capacitor in series with a signal to create a high-pass filter?

• A. The capacitor blocks high frequencies and passes DC.
• B. The capacitor passes all frequencies without attenuation.
• C. The capacitor blocks DC (0 Hz) and passes higher frequencies; output has reduced or removed DC offset and attenuated low-frequency content.
• D. The capacitor eliminates all frequencies.

Answer: (C)