Oliver Evans is most associated with which invention?

(A) The mechanized fl our mill

(B) The cotton gin

(C) Interchangeable parts

(D) The fi rst commercial steamboat

(E) The fi rst textile mill in the United States

Oliver Evans is most associated with the " (D) The first commercial steamboat," although it should be noted that his original version of the steamboat, which he launched on the Delaware River, was very crude, and did not resemble many of the later steamboat models.