The correct answer is: C. capacity.
Broadband is a high-speed data transmission that allows multiple signals to be transmitted simultaneously over a single communication channel. Baseband is a low-speed data transmission that allows only one signal to be transmitted at a time over a single communication channel.
Broadband has a higher capacity than baseband, which means that it can carry more data at the same time. This makes broadband ideal for applications such as streaming video, downloading large files, and online gaming.
Baseband is less complex than broadband, which makes it less expensive to implement. However, baseband has a lower capacity than broadband, which makes it less suitable for applications that require high-speed data transmission.
Availability, reliability, and transmission are not the basic differences between broadband and baseband. Availability refers to the likelihood that a service will be available when needed. Reliability refers to the likelihood that a service will function correctly when it is available. Transmission refers to the process of sending data from one location to another.
In conclusion, the basic difference between broadband and baseband is capacity. Broadband has a higher capacity than baseband, which means that it can carry more data at the same time.