For D first we figure out what the director's claim is.
"The director claims that this production is as similar to
the original production as is possible in a modern
Answer D says "The considerations given best serve as part of an
argument that the performance of the actor who plays
Harlequin in La Finestrina does not serve as
evidence against the director's claim."
So what's significant about the performance of the Harlequin actor?
"Although the actor who plays Harlequin the
clown gives a performance very reminiscent of the
twentieth-century American comedian Groucho Marx,
Marx's comic style was very much within the comic
acting tradition that had begun in sixteenth-century
So does the actor's performance of the actor even suggest that the performance of the production is different because its in a modern theater? No because, though the harlequin actor's performance looks like Groucho Marx, Groucho Marx's style followed a tradition that predated the actual writing of the play and part in question. Thus, D works. This was a toughy though.
He that is in me > he that is in the world. - source 1 John 4:4