Given the universal set . Then equals: ( ).
(A)
(B)
(C)
(D)
Problem 300
Official solution
1. D
Translate the text above into English, please retain the original text's line breaks and format, and output the translation result directly.
Given the universal set . Then equals: ( ).
(A)
(B)
(C)
(D)
1. D
Translate the text above into English, please retain the original text's line breaks and format, and output the translation result directly.