Answer
The median.
Work Step by Step
The score 95 pulls the mean to the right substantially. That is, the mean increases substantially. But not the median.
Let's remove the 95 from the sequence:
$Mean=\frac{65+70+71+75}{4}=70.25$
$Median=\frac{70+71}{2}=70.5$
Now, compare these results to those from (a) and (b).
