Final answer:
The maximum allowable cable length is 5 meters for both Full Speed and High Speed USB, as per the specifications set to ensure reliable device communication.
Step-by-step explanation:
The maximum allowable cable length for Full Speed USB is 5 meters (option c), while for High Speed USB, it is also 5 meters (option c). USB specifications set maximum length limits for cables to ensure reliable communication between devices. Signals on USB cables degrade over distance, and longer cables can also suffer from signal timing issues, power delivery problems, and increased noise interference. Both Full Speed and High Speed USB are designed within those parameters to maintain proper functionality. It is essential to use cables that conform to these standards to avoid data errors and connection problems.