Verified Answer :

AQuark is incorrect, because it is a particle (very small).

b) Einstein was a man, not a model. -_-

c) Final frontier was not a model also.

d) We are left with our best answer, quantum mechanics. It is the correct answer! It is used by modern physicists. 

Final answer:- d) quantum mechanics 

joanwalsh

Answer:

if ur on timeforlearning it would be c but same  answer

Explanation:

C. quantum mechanics

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