What Is the Value of S3 After the Following Code

Multiple Choice

What is the value of s3 after the following code is executed
Var s1 = "one";
Var s2 = "two";
Var s3 = "three";
S1) concat( s2 ) ;
S3 = s1;

A) one
B) onetwo
C) three
D) onetwothree