10 or numeric codes are described as which system?

10 or numeric codes are described as which system?

• A. System of communication using ten-digit prefixes
• B. System of numeric codes with no prefixes
• C. System of communication by which 10 precedes numbers that stand for specific activities
• D. System of communication that uses numbers after the word signal

Answer: (C)

Ten-codes are a shorthand radio language used to speed up communication. The defining part is that the two-digit prefix 10 comes before a code number that stands for a specific activity or status. This lets responders convey quick, standardized messages over busy channels. That’s why the description that matches is a system of communication by which 10 precedes numbers that stand for specific activities. For example, codes like 10-4 or 10-20 illustrate how the 10-prefix introduces the particular meaning. The other options don’t fit because there is a 10-prefix in use, it isn’t a system with no prefixes, and the codes aren’t described as numbers after the word signal.