Consider the following method:
public static String joinTogether(int num, String[] arr)
{
String result = "";
for (String x : arr)
{
result = result + x.substring(0, num);
}
return result;
}

The following code appears in another method in the same class:
String[] words = {"dragon", "chicken", "gorilla"};
int number = 4;
System.out.println(joinTogether(number, words));

What is printed when the code above is executed?
a. dragonchickengorilla
b. drachigor
c. dragchicgori
d. dragochickgoril
e. There is an error in the program, it does not run