Answer:
Listening to the CD her sister had sent, Mia was overcome with a mix of emotions, such as happiness, homesickness and nostalgia.
Step-by-step explanation:
The sentence fragment "Happiness, homesickness, nostalgia" can be fixed by adding it to an independent clause. In this case, the sentence fragment illustrates Mia's feelings, so they exemplify how she felt after listening to her sister's CD.