Given the Following Code, What Is the Correct Statement to Insert

Multiple Choice

Given the following code, what is the correct statement to insert the string str2 into str1, directly after the 'd'?
String str1="abcdefg";
String str2="ABCDE";

A) str1.insert4,str2) ;
B) str2.insert4,str1) ;
C) insertstr1,4) =str2;
D) insertstr2,4) =str1;