Question: Given the $\angle ABC$, which is the third step in making a copy of $\angle ABC$?

1. **State the problem:** We want to identify the third step in the process of copying $\angle ABC$. 2. **Recall the steps to copy an angle:** - Step 1: Place the compasses on the vertex of the original angle and draw an arc intersecting both sides. - Step 2: Draw a ray from the new vertex to start the copied angle. - Step 3: Using the same compass width, draw an arc from the new vertex to intersect the ray. - Step 4: Measure the distance between the intersection points on the original angle and replicate it on the new arc. 3. **Analyze the options:** - Option A corresponds to Step 1. - Option B corresponds to Step 2. - Option D corresponds to Step 4. - Option C corresponds to Step 3. 4. **Conclusion:** The third step is Option C: Without changing the compasses' width, move the compasses to $M$ and draw an arc across the first one, creating point $L$ where they cross. Draw a ray $PR$ from $P$ through $L$ and onwards a little further. The exact length is not important. **Final answer:** The third step is Option C.