Which of the following will reassign the value of String karelString = "Karel the dog"; to just "Karel"?

1. Correct Answer
   Incorrect Answer
   a

   int end = karelString.indexOf(" ");
   karelString = karelString.substring(0, end - 1);

   Java
2. Correct Answer
   Incorrect Answer
   b

   int end = karelString.indexOf(" ");
   karelString = karelString.substring(0, end);

   Java
3. Correct Answer
   Incorrect Answer
   c

   int end = karelString.indexOf("t");
   karelString = karelString.substring(0, end);

   Java
4. Correct Answer
   Incorrect Answer
   d

   int end = karelString.indexOf("t");
   karelString = karelString.substring(0, end + 1);

   Java
5. Correct Answer
   Incorrect Answer
   e

   int end = karelString.indexOf(" ");
   karelString = karelString.substring("Karel");

   Java