Final answer:
A licensee with a temporary license must notify the Commission and both the former and the new broker when transferring to a new qualifying broker.
Step-by-step explanation:
If a licensee holding a temporary license wishes to transfer to a new qualifying broker, he/she must provide written notification to the Commission and both brokers. This means that both the former broker and the new broker need to be informed of the change along with the relevant regulatory body overseeing real estate licensing, often referred to as 'the Commission'. The appropriate answer to the question is option 3) the Commission and both brokers.