Option C:
The second step is draw two circles with radius AB.
Solution:
Given data:
Triangle ABC is an equilateral triangle.
In equilateral triangle, all the sides are equal.
AB = AC = BC
The two circles are overlapping each other.
Each circle touches the center of the other circle.
This means the radius of two circles are equal.
The distance from center to boundary of the circle is radius.
So that AB is the radius of both circles.
Hence the second step is draw two circles with radius AB.
Option C is the correct answer.