Question

Given: ABC

Prove: The three medians of ABC intersect at a common point

When written and in the correct order, the two-column proof below describes the statements and justifications for proving the three medians of a triangle all intersect in one point.

Which is the most logical order of the statements and justifications I, II, III and IV to complete the proof?

IV, II, III, I
II, IV, I, III
IV, II, I, III
II, IV, III, I