Explanation: The correct answer is B. Here's why: NAVTEX (Navigational Telex) is a key component of the Global Maritime Distress and Safety System (GMDSS) for broadcasting maritime safety information. NAVTEX messages are categorized, and receivers are designed to handle them differently: * **Categories A (Navigational Warnings), B (Meteorological Warnings), and D (Search and Rescue Information/Piracy Alerts)** are considered essential for safety and **cannot be deselected or rejected** by the operator on a compliant NAVTEX receiver. They are always received. * **Category L (Additional Navigational Warnings)**, along with other categories like C, E, F, G, H, I, J, K, **can be deselected or rejected** by the operator to reduce printouts or irrelevant information. Let's evaluate the options: * **A) No NAVTEX receiver can be programmed to reject category A, B, D and L messages since they are essential warnings.** This statement is **false**. While A, B, and D are non-rejectable, category L *can* be rejected. The inclusion of "and L" makes this statement incorrect. * **B) A GMDSS Radio Operator may choose to program certain NAVTEX receivers to reject category A, B, D and L messages.** This statement is the **most correct** option, albeit imperfectly phrased. An operator *may choose* to reject category L messages (which are part of the listed categories) on compliant receivers. While A, B, and D cannot be rejected, the statement doesn't claim *all* listed categories can be rejected, only that the operator *may choose to program* receivers to reject messages from this group, which is true for L. * **C) Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operator enters the station's identity into the receiver.** This is generally **false**. Modern GMDSS-compliant NAVTEX receivers automatically detect and store the identity of receivable stations. Manual entry is not typically required for routine operation. * **D) The GMDSS Radio Operator can select the "None" option in the message category menu.** This is **false**. Selecting "None" would mean rejecting all messages, which is not possible since categories A, B, and D are mandatory and cannot be deselected.