Answer: As per listed below:
Step-by-step explanation:
C: 52 Hz
A 13 words-per-minute (wpm) International Morse Code transmission would have a bandwidth of approximately 40 Hz. The closest in this list is 52 Hz.
This is because Morse Code signals consist of a series of short and long tones, known as "dots" and "dashes," that are combined to form letters and words. Each dot or dash is typically transmitted at a frequency between 500 and 1500 Hz, with an average frequency of about 1000 Hz.
At a speed of 13 wpm, the Morse Code transmission would consist of about 80-90 characters per minute, which translates to a signal rate of approximately 80-90 Hz. However, because the individual dots and dashes within each character are typically spaced very closely together, the bandwidth required to transmit the signal is much wider than the signal rate would suggest.
In general, a rule of thumb for calculating the bandwidth of a Morse Code transmission is to multiply the signal rate by a factor of 2.5 to 3. So for a 13 wpm transmission, the bandwidth would be approximately 200-270 Hz, but in practice, the required bandwidth may be less depending on the specific transmission characteristics and equipment being used.