E1A06: What is the required transmit frequency of a CW signal for channelized 60 meter operation?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E1A06 is At the center frequency of the channel.

The key fact is At the center frequency of the channel. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.