In constructing an angle bisector, the next step after drawing an arc with the compass at point B involves marking intersections with another arc. When placing the compass point at B, Aubrianna should draw an arc that intersects both rays (CA and AB) of the angle.
To properly create the angle bisector, she should follow up by placing the pointed end of the compass on point C and drawing another arc that intersects with the previous arc drawn at point B. By marking these points of intersection (let's call them D and E), she can then use a straight edge to draw a line from point A through the midpoint of DE, which will bisect the angle CAB.
Hence, the best response would be:
- Aubrianna must place the pointed end of the compass on point C and draw an arc between the angle above points C and B.