The salaries of six bank employees are $37,000, $38,500, $35,000, $37,000, $45,000, $40,000, and $75,000. Which statement is true?

Both the mean and median are appropriate measures of center.
The median is the only appropriate measure of center.
The mean, median, and mode are all appropriate measures of center.
Both the median and mode are appropriate measures of center.