Self-study
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I don’t think u need to make that high level of an assumption to accept E as a strengthener. Although it might not be the exact same effects on all animals, this AC somehow shows how this theory/explanation is believable. You dont have to assume anything about porpoise as well. Im getting the feeling u might have confused it with MSS?
I didn't get a tutor but am currently tutoring and my advice would be when you feel stuck. Tutor can really bring in a new perspective as she/he got the high score from efficient thought process that lsat values.