The two text structures that would best fit an essay about the most influential presidents in history, with an emphasis on how they influenced one another and the world, are:
C. Cause and effect - This structure allows for the exploration of how the actions and policies of one president may have led to changes or influences on subsequent presidents or global situations.
E. Compare and contrast - This structure would enable a discussion of similarities and differences between these presidents, highlighting how their leadership styles, decisions, and influences shaped each other and the broader historical context.
These two structures would effectively allow for a comprehensive analysis of the relationships and impacts among influential presidents and their legacies.