Zoe is using the figure shown below to prove Pythagorean Theorem using triangle similarity: In the given triangle ABC, angle A is 90o and segment AD is perpendicular to segment BC. The figure shows triangle ABC with right angle at A and segment AD. Point D is on side BC. Which of these could be a step to prove that BC2 = AB2 + AC2? (6 points) Select one: a. By distribution, AC2 plus AB2 = BC multiplied by the quantity DC plus AB. b. By distribution, AC2 plus AB2 = BC multiplied by the quantity DC plus BD. c. By distribution, AC2 plus AD2 = BC multiplied by the quantity DC plus AB. d. By distribution, AC2 plus AD2 = BC multiplied by the quantity DC plus BD.