A city planner is mapping out some new features for a triangular park. She sketches the park on grid paper. The coordinates of the vertices of the park are (1, 1), (1, 4), and (−3, 4). The city planner wants to plant a tree at the orthocenter of the park. What are the coordinates of the tree?
A. (–1, 2.5)
B. (−13, 3)
C. (0, 3)
D. (1, 4)