Which of the following functions are associated with an AMR riser card?

An AMR (Audio/Modem Riser) riser card primarily serves the purpose of providing an interface for audio and modem functions in a computer system. The correct choice related to the main function of the AMR riser card is the modem.

AMR riser cards were created to reduce the amount of space and components on motherboards by integrating audio and modem capabilities onto one card, thereby allowing for easier upgrades and modularity. The emphasis on modems aligns with the design intention of the AMR standard to provide a connection for modem functionalities, facilitating dial-up internet access and other communication services.

While audio capabilities are a feature of AMR, the riser's primary focus is often on modem functions, which is why the connection to modems is better highlighted here. Other functions, such as network interface and graphics, are typically handled by different types of expansion cards or onboard components, and are not associated with the AMR riser card's design or purpose.