The correct responses regarding how Muybridge's work influenced painters like Thomas Eakins are:
- Eakins used photographs to study the human body and the phases of action.
- Eakins used photographs as a teaching tool with students.
- Eakins traced subjects in photographs to make some paintings.
(Note: The repetition of the first two options in your list is likely a mistake; they are both the same and should only be counted once.)