Answer: It shows that the second sentence contains more information on the same topic as the first sentence.
Explanation: Based off the signal word "another", the second sentence contains more information on the same topic as the first sentence. We can easily eliminate all other options such as A, C, and D. As, when it comes to answer A, the information does not matter when it appears in the sentence. When it comes to answer C, the second sentence is not presenting an idea that is opposite of the first, as it's only adding more information. Lastly, when it comes to answer D it is not summarizing the idea presented in the first sentence, as it is not talking about artist sales more about the illegal part of downloading free music.
I hope this helps!!