In "Song of the Open Road," Whitman says that individuals can find themselves on the open road.
In the poem, Whitman equates the indoors with negativity. Therefore, the library would not be correct. Furthermore, he says that this world, America, is beautiful and must be enjoyed; so "a world other than this one" would also be incorrect. America may be a land of good fortune but Whitman is specifically praising the road of America. Therefore, the only correct answer for this one is A: "on the open road."