What is the most likely way Yasmin determined the meaning of "monocracy” as being related to "ruling”?

the context clues
the prefix
the suffix
the word root

The most likely way Yasmin determined the meaning of "monocracy" as being related to "ruling" is through the word root.

The most likely way Yasmin determined the meaning of "monocracy" as being related to "ruling" is through the word root.