At Law Practice, Inc. , last year the average annual salary for attorneys was $75, 000, while the average salary for paralegals was $50, 000. The average annual salary for all Law Practice employees was $45, 000. If the information above is correct, which one of the following conclusions can properly be drawn on the basis of it? ['There were two attorneys and three paralegals at Law Practice last year.', 'At least one paralegal made less than $50, 000 last year.', 'There were more paralegals than attorneys at Law Practice last year.', 'There was at least one Law Practice employee who earned less than the average paralegal earned last year.']