Question: Given: 1. public class TestString1 { 2. public static void main(String[] args) { 3. String str = 420; 4. str += 42; 5. System.out.print(str); 6.

Given:

1. public class TestString1 {

2. public static void main(String[] args) {

3. String str = "420";

4. str += 42;

5. System.out.print(str);

6. }

7. }

What is the output?

A. 42 B. 420 C. 462 D. 42042 E. Compilation fails. F. An exception is thrown at runtime.

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