Which of the following statements about the functions of an AAU are correct?

An AAU is responsible for performing up/down conversion of spectrum, power amplification, signal filtering, and analog-to-digital/digital-to-analog conversion. It does not perform baseband data processing. This is stated in the official 3GPP documentation which states: "The AAU performs up/down conversion of spectrum, power amplification, signal filtering, and analog-to-digital/digital-to-analog conversion." Here is a link to the relevant 3GPP documentation for further reference: https://www.3gpp.org/dynareport/33222.htm