Answer:
hi the answer will be option 3 in the first line she says that art Is so unscientific. but in the last line she says that art reminds her of science.
There is no sentences stated here-
A, The river is constantly changing. I did this last year so I know what the answer is. Fickle means changing frequently or in my term, stubborn. In his point of view, the river has a mind of its own and changes often. Which he described as "fickle." It may be hard for Twain to pilot a steamboat, if the river is constantly changing.
