The different spelling of the Safari sign in "The Sound of Thunder" signifies that they have in some way changed the future by disrupting the past (the butterfly Eckels stepped on and brought with him to the present).
The answer is D. The travelers have disrupted history.
B) Because there is the past, present, and future. There is Informative, Demonstrative speeches, persuasive, and Entertaining.<span />
Answer:
I would say the answer is C.