B. Roots
Roots are the smallest meaningful parts of words. For example the root word of aquamarine would be Aqua, which means water. So the root word can also give you a hint on the meaning of the word.
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The best government is that which governs least. No human depositories can, with safety, be trusted with the power of legislation upon the general interests of society so as to operate directly or indirectly on the industry and property of the community.
Answer B, because Candidate A is described with the most important things to become a school president