Napster is a high-profile P2P network that gives its members the revolutionary ability to connect directly to other members computers and search their hard drives for digital music files to share and trade. In addition to file sharing, computing power can be shared by P2P networks. Based on the context, what is the given information, A, B, C, or D?（ ）
选项：

A:Napster
B:P2P network
C:digital music files
D:file sharing