Answer:
“No one knows when chimps and humans first came into contact, but it seems certain that Africans have long interacted with chimps.”
Explanation:
The words tell the reader that this sentence contains subjective language is "but it seems certain'.
It should be noted that a subjective language simply means the words that are used to express opinions.
In this case, the words tell the reader that this sentence contains subjective language is "but it seems certain'.
Learn more about subjective language on:
https://brainly.com/question/24126590
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