Can you help me solve the Python question?

Consider the following function definition def update(user_in): userin += 1 return user in - Which of the following client calls will always result in the variable client_val being incremented by exactly 1? Assume all variables in the client are defined and have values before the call.) 0 | client-val-update(y) y-update(client_val) Oclient_val - update(client_val) update(client_val)