Final answer:
The proverb that mirrors a major theme in 'A Sound of Thunder' is about considering long-term consequences of decisions, akin to the butterfly effect depicted in the story. The proverb that most closely reflects a major theme in 'A Sound of Thunder' is option (D). 'In our every deliberation, we must consider the impact of our decisions on the next seven generations.'
Step-by-step explanation:
The proverb that most closely reflects a major theme in "A Sound of Thunder" is in our every deliberation, we must consider the impact of our decisions on the next seven generations. The story by Ray Bradbury emphasizes the significant and sometimes unforeseen consequences our actions can have, particularly when tampering with time.
This is best exemplified by the butterfly effect within the narrative; a small action, such as stepping on a butterfly in the past, has monumental effects on the future. The chosen proverb encapsulates the theme of considering the long-term impact of our decisions.