A Palindrome Is a Word or Phrase That Reads the Same

A palindrome is a word or phrase that reads the same forward or backward. Consider the following code snippet:
Public boolean palindrome(String string)
{
Return isPal(string, 0, string.length() - 1) ;
}
Private boolean isPal(String string, int left, int right)
{
If (left >= right)
{
Return true;
}
Else if (string.charAt(left) == string.charAt(right) )
{
Return isPal(string, left + 1, right - 1) ;
}
Else
{
Return false;
}
}
What is the purpose of the palindrome method?

A) Return the palindrome to the calling method.
B) Provide the string, along with its first and last indexes to the recursive isPal method.
C) Send the recursive isPal method its terminating condition.
D) Recursively call itself.