挑错题：下列A、B、C、D注释标注的哪行代码有错误？public class E {public static void main (String[]args) {String str1 = new String(""); //Aint [] a = {97,98,99};String str2 = new String (a); //Bchar [] c = {'a','b','c'};String str3 = new String (c); //CString str4 = new String(); //DSystem.out.println(str4.equals(""));}}

A
B
C
D