Based on the frequency stated and emission mode, which of the following combinations is prohibited?

Fast-scan television (ATV) requires a very large amount of bandwidth to transmit full-motion video, typically around 6 MHz. This is roughly the same amount of spectrum required by traditional broadcast television channels. The entire 2-meter amateur radio band spans from 144 MHz to 148 MHz, meaning it is only 4 MHz wide in total. Attempting to transmit a 6 MHz ATV signal on 145 MHz is prohibited because it is physically impossible to fit the signal inside the band; it would severely spill over into adjacent commercial or government frequencies. Conversely, the 70-centimeter band (which includes 440 MHz) is 20 MHz wide in Canada, providing plenty of space for a 6 MHz ATV signal. Narrow modes like FT8 and CW use barely any bandwidth and easily fit into their respective HF allocations.