A job placement agency advertised at last year its clients, on average, had a starting salary of 39,000. Assuming the average refers to the mean, which of the following claims must be true based on this information? Last year the number of their clients who had a starting salary of 39,000 or above was equal to the number of their clients who had a starting salary of 39,000 or below. Last year all their clients had a starting salary of more than 37,000. Last year some of their clients had a starting salary of exactly 39,000. Two years ago at least one of their clients had a starting salary of at least 39,000. Or none of the above statements are true