Explanation: The FCC recognizes the comprehensive technical and operational knowledge demonstrated by Amateur Extra Class operators. This highest amateur license level, which historically included significant Morse code proficiency requirements, is deemed sufficient to satisfy specific commercial radio operator examination elements. Specifically, Amateur Extra Class operators are granted examination credit for Commercial radio operator telegraphy Elements 1 and 2. These elements assess fundamental and advanced telegraphy skills, and the FCC, under Part 13 rules, considers the qualifications of an Amateur Extra Class licensee to meet these standards. Option A refers to specific Morse code speeds, which were skills required but not the credit itself. Option B is incorrect, as these credits are explicitly allowed. Option D describes a basic written element (Element 1), which is a different, lower-level commercial qualification and not the specific telegraphy credit accorded Extra Class operators.