![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
下面语句中,哪条语句是实现截取字符串功能的语句? A. string str1="C# IS PROGRAM LANGUAGE."; string str2=String.Copy(str1); Console.WriteLine(str1); Console.WriteLine(str2); B. string str1="C# IS PROGRAM LANGUAGE."; string str2=str1.Remove(14); Console.WriteLine(str1); Console.WriteLine(str2); C. string str1="C# IS PROGRAM LANGUAGE."; string str2=str1.Insert(14,"I Love Program"); Console.WriteLine(str1); Console.WriteLine(str2); D. string str1="C# IS PROGRAM LANGUAGE."; string str2=str1.Substring(14,8); Console.WriteLine(str1); Console.WriteLine(str2);