Final answer:
The music streaming business is still a long way from maturity.
Step-by-step explanation:
The subject of this question is Business and it is suitable for High School level.
The correct answer to the question is D) Still a long way from maturity.
The passage provided states that the music streaming business is still a long way from maturity, suggesting that it has not yet reached a fully developed or stabilized state. This indicates that the business is still evolving and has further to progress before it reaches maturity.