What fragment is missing from this sentence the kindest most generous person in the world? a modifier
the predicate
the subject
a conjunction

The subject and predicate (verb) are missing, including a conjunction between "kindest" and "most."

Explanation:

When the subject, a verb, and a conjunction are added to the phrase "the kindest most generous person in the world," it will then become a sentence.  In its present form, it remains a phrase, that is, a group of words without meaning.  For example, we can correctly rephrase the above into a sentence as: "John remains the kindest and most generous person in the world."

according to classical republican political theory, which democratic republics would function best?

a.   small republics, with people who had similar interests

b.   large republics, with people who had competing interests

c.   republics made up entirely of landowners

d.   republics made up entirely of servants