What are the Hang Seng China Enterprises Index and the Hang Seng China Enterprises Index respectively?
选项：

A:The constituent stocks of the Hang Seng China Enterprises Index must be registered in Hong Kong or overseas, while the constituent stocks of the Hang Seng China Enterprises Index must be registered in China.
B:The constituent stocks of the Hang Seng China Enterprises Index must be registered in Hong Kong or overseas, while the constituent stocks of the Hang Seng China Enterprises Index must be registered in China.
C: Hang Seng China Enterprises Index is the former name of Hang Seng China Enterprises Index.
D: Hang Seng China Enterprises Index is the former name of Hang Seng China Enterprises Index.