The graph shows the number of hours Stan worked on a school project. For how many hours in total did he work on the project?
(A) 6
(B) 2
(C) 8
(D) 9
(E) 10

![](https://cdn.mathpix.com/cropped/2024_04_20_6027bc27089ed4fc493cg-031.jpg?height=447&width=393&top_left_y=706&top_left_x=1321)