The correct answer is C) the identity signal of the station called. When signaling by flashing light, the "call" part of the signal indicates the identity of the station being called. This is typically done by transmitting the unique identifying signal of the target station, such as its radio call sign or other designated identifier. This allows the receiving station to clearly understand who is being called. The other options are incorrect because: A) spelling out the name is not the standard practice, B) omitting the call is not allowed, and D) sending "CQ" is used for general calls rather than identifying a specific station.