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31 August, 03:12

In sentence 8, what is the BEST definition for signature?

"Signature whistles were used by dolphins to identify one another in many situations."

A) one's identity

B) the signing of a document

C) a distinctive characteristic

D) a unique biological structure

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Answers (2)
  1. 31 August, 05:14
    0
    D) a unique biography structure
  2. 31 August, 06:24
    0
    I think the answer would be d because in that signature means unique
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