We have to choose the option which is the result of the construction of a median of a triangle.
When we draw a straight line from a vertex of a triangle to the midpoint of the opposite side then the straight line is called a median of the given triangle.
Hence, when we draw a median of a triangle then it results " A side of the triangle is bisected ". (Answer)
I think, he made a mistake because the exponents have different values but then if you'll look at his results, he just wrote the same thing. If you want, you could post the original problem, and I'll solve it for you :)