Final answer:
Without additional context, it is not possible to determine what Trevor started doing with the CDs he was selling. Possible actions include making mixtapes, giving them away, burning more copies, or returning them to the supplier.
Step-by-step explanation:
To answer your question about what Trevor started doing with the CDs he was selling, we need more context as there might be multiple stories or scenarios involving a character named Trevor who sells CDs. Without this information, it is not possible to give a definitive answer.
The options given, such as making mixtapes, giving them away for free, burning more copies, or returning them to the supplier, all imply different actions that Trevor could have taken in regards to the CDs.
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