Answer:
The multimedia feature that Talia should include to convince readers is an audio of her brother's band best songs is. The correct answer is A.
Step-by-step explanation:
Every other option might be entertaining for a reader, especially the gallery of pictures or interacting with the author by making them participate, but the only way to convince them that her brother's band is the best in town is by making them hear their music. If she really thinks this is the best band, the best way to prove it is by posting evidence. An audio of their best songs would be the perfect fact to prove what she believes.