If this question has the same set of options like the previous ones, the answer to this question is letter C. Median.
A line connecting a vertex of a scalene triangle with the midpoint of the opposite side is the median.
A median of a triangle is a line segment joining a vertex to the midpoint of the opposite side.
Here are the following choices:
A. altitude.
B. bisector of the angle at the vertex.
C. median.
D. perpendicular bisector of the side.