Which of the following one-way communications may NOT be transmitted in the amateur radio service?

The amateur radio service is fundamentally designed for two-way communications between licensed amateurs, not for broadcasting to a general audience. Transmitting broadcasts intended for the general public, like a radio station or news bulletin, is strictly prohibited. While amateur radio generally requires two-way contact, there are a few specific exceptions where one-way transmissions are permitted. These include Morse code practice, brief test transmissions for adjusting equipment, and sending control commands to model craft.