The statement that would be most important to include in a summary of the end of the story from paragraphs 4 and 5 is: C - The Martians are conquered by simple disease bacteria to which their bodies are not immune.
What is the statement
This statement encapsulates a pivotal moment in the story's resolution, explaining how the Martians, despite their advanced technology and superiority, were ultimately defeated by Earth's humble bacteria, to which the Martians had no immunity.
This occurrence marks the unexpected turning point that leads to the downfall of the Martian invaders, making it a crucial detail to include in summarizing the end of the story.