What is the value returned when the integer 3 is the argument to the factorial method?
The following code for the method factorial() applies to the next two questions:
```
public static double factorial (double n)
{
if (n == 0)
{
return 1;
}
else
{
return n * factorial(n-1);
}
}
```
(a) 2
(b) 4
(c) 6
(d) 8
(c) 6
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