Answer:
C. Root.
Explanation:
The root of a word is the source or origin of that word. In a word, there can be one or more roots but it will always have at least one root.
But the presence of the suffix, affix, or prefix is not a must in a word. That means, a sentence may have a word but not necessarily include an affix, a suffix, or a prefix. These 'extra' words are present only in some sentences and not always.
Thus, all words have a root that is the main part of a word.
