E4E05:What is used to suppress radio frequency interference from a line-driven AC motor?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E4E05 is A brute-force AC-line filter in series with the motor’s power leads.

The key fact is A brute-force AC-line filter in series with the motor’s power leads. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.