After teaching a client about taking daily oral iron preparations for a moderate iron deficiency anemia, which statement by the client indicates to the nurse that additional instruction is needed?

Which of the following exceptions could occur when the following code is run, if the precondition is met? // precondition: a is not null public string dosomething(arraylist a, int b) { int i; string s; for (i = 0; i < = a.size(); i++) { s = (string)(a.get(i)); if (s.length() == b) { return s; } } return null; }