A sample of 99 distances has a mean of 24 feet and a median of 24.5 feet. Unfortunately, it has just been discovered that an observation which was erroneously recorded as "30" actually had a value of "35." If we make this correction to the data, then
(a) The mean remains the same, but the median is increased.
(b) The mean and median remain the same.
(c) The median remains the same, but the mean is increased.
(d) The mean and median are both increased.
(e) We do not know how the mean and median are affected without further calculations, but the variance is increased.