What is the time complexity of this code?

Suppose the runtime of the bar(int[] numbers, int i) method is O(n), where n is the length of the input array. What is the runtime of the method foo when the input array has length n?

public void foo(int[] numbers){ for(int i=0; i

Is it

a) O(n)

b) O(nlogn)

c)O(n^2)