Answer: Option A.
Step-by-step explanation:
The first step is to place the point of the compass in the vertex of the angle and draw an arc that connects both rays.
Then you put the compass in the points where the arc intersected the rays and draw two new arcs (with the radius of the compass constant)
The point where the two new arcs intersect will be the interior point.
Then the first step is: place the compass in the vertex of the angle.
The vertex is the common point to the two rays, in this case, we can see that the vertex is the point A.
Then you should place the compass in the point A, the correct option is option A.
