Answer:
Option B) Sides of equilateral triangle DPC are equal
Explanation:
As given:
DPC is an equilateral triangle
By definition of equilateral triangles: All the three sides of triangle DPC will be equal in length to each other
i.e.
DP=PC=DC
In Nick's proof , justification of DP=PC is option B) Sides of equilateral triangle DPC are equal !