For an essay focusing on how major safety concerns in the food industry have been addressed over time, specifically highlighting the actions of historical figures that led to positive changes, the two best text structures would be:
A. Sequential - This structure allows for a chronological presentation of events, making it suitable for detailing the historical timeline of safety concerns and the corresponding actions taken by various figures.
C. Problem and Solution - This structure would effectively highlight specific safety concerns as problems and then illustrate the solutions provided by the actions of historical figures. It allows for a clear discussion of what needed to be addressed and how it was resolved.
Using these two structures would enable a clear and organized presentation of the topic.