定义一个颜色的枚举类型Color，下面正确的是（）。

A.public enum Color {red, green, yellow, blue}

B.public enum Color {1:red, 2:green, 3:yellow, 4:blue}

C.public enum Color {1:red; 2:green; 3:yellow; 4:blue}

D.public enum Color {Stringred, String green, String yellow, String blue}

正确答案：public enum Color {red, green, yellow, blue}