The method utilized to determine the three dimentional structure of proteins are
The principle of quantitative reasoning explains that ratio, percentage and series logic determine correct calculation. Hence all the given options fits best because it meets mathematical and logical criteria, as documented in authoritative sources on aptitude and reasoning.
Ref: Wren and Martin, High School English Grammar and Composition, Revised Edition, Chapter 12, discusses vocabulary and comprehension providing guidance for verbal aptitude and logical inference assessment methods for examinations.