Answer:
to lend credibility to the claim that other species also use tools
Explanation: it makes more sense than all the other options B to show chimpanzees are not intelligent disproves her first point at the start of the story especially when she said accept as human because humans are the smartest animals there is and let us be honest C is just obviously wrong.
A
The narrator's honesty in a matter that doesn't entirely complement him makes him seem genuine.
Dual in the simplest form means two
Living "A dual existence" could mean being someone at a particular moment and another person at another moment.
White mentioned being a father in the present and being a son in the remembered life of the past.
This means White was first a "<em>son</em>" to his "<em>father</em>" in the past and he is now a "<em>father</em>" to his "<em>son</em>" in the present. Therefore, he is living two different lives; life as a <em>son</em> and life as a <em>father</em>.
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27. A. Dictionary
Dictionary has the root word of dict