Nikita began with the figure shown. She completed the following actions to construct the angle bisector of ∠ABC, but made a mistake in one of the steps. Select the step in which her mistake was made.

Step 1: She placed the compass on point B and drew an arc which intersects ray BA at point D and ray BC at point E.

Step 2: Next, she placed the compass on point D and drew an arc on the interior of ∠ABC.

Step 3: Then, she placed the compass on point C and drew an arc on the interior of ∠ABC, which intersects the previous arc.

Step 4: She labeled the intersection of the two arcs as point F and drew the ray BF, which represents the angle bisector of ∠ABC.