Recursion Tracing Exercise: Function Error

Consider the following code: public void stringRecur(String s) { if(s.length() < 15) System.out.println(s); stringRecur(s + "*"); }
When will method stringRecur terminate without error?

It never works. It calls itself for any input and goes into an infinite loop.

Only when the length of the input string is greater than or equal to 15.
Only when an empty string is input.
For all string inputs.
Only when the length of the input string is less than 15.

Does triggering the "if" statement affect whether a recursive call is made?