The correct answer is 4: Cassius cannot believe that a weakling like Caesar has become so great. Cassius complains of being forced to bow before Caesar (he "must bend his body If Caesar carelessly but nod on him"), and the fact that Caesar has suffered from fevers and seizures makes his submission to him all the more enraging. Cassius does not believe himself to be less than any other man, much less one who has such weak health.
Simile and mythological. The reason why is because a simile has like or as (acting "like" Hercules) and it talks about something that is a myth (Hercules.) It is not a metaphor since it has "like," it does have alliteration since it does have a repeated letter, it is not a hyperbole since it does not talk about anything so dramatic (instead, it was a simile,) it is not a literal language since it has simile and mythological.
Hope this helped!
Nate