Answer:
I think all of the above because without all of them your essay wouldn't make sense
Sorry but what is the question , no question is being asked here
Answer:
The two themes which are most developed in Frankenstein are :-
B. The pursuit of technology and the loss of humanity.
D. The meaninglessness of beauty and the joy of friendship.
Hope it helps!
It would be C, "is" if you say any of the other ones with that sentence it sounds silly.