Explanation: Proper and legal VHF operations require the operator to select the correct frequency (A), whether to operate simplex or duplex (B, though "alpha channel modes" refers to display settings, not transmission legality), and the appropriate power level (D) to comply with the minimum power rule. However, **C) The correct bandwidth must be selected by the operator,** is generally not a direct operator responsibility in the same way. For most VHF/UHF amateur radios, especially for common FM voice communications, the bandwidth is determined by the selected modulation mode (e.g., FM, NFM, SSB, C4FM) and is largely fixed by the radio's design for that mode. Operators typically select the *mode*, and the radio automatically applies the appropriate bandwidth characteristics. There isn't usually a separate, explicit "bandwidth" control that the operator *must* select for legal or proper operation.