Greetings:
Could you please explain why answer E is the correct answer for Q5?
I did NOT select E because I thought that lines 37-40 did explain why the okapis animals leave a lot of their "preferred" plants un-eaten: The passage says that "...okapis will leave much of it uneaten, choosing to move on and sample over leaves." (my italics). As the italtic portion indiciates, I thought that sounded like a a reason why the animals don't eat much of their "preferred plants."
(Plus, the passage says -- a few lines before - that these guys don't eat any single plant to the exclusion of others. )
As usual: Many thanks in advance.