The correct answer is; "What proof the tripster is able to provide".
That´s because as a reporter, he must make sure about the authenticity of the accusation as he cannot post apocryphal news.
The third sentence contains two verbs. The puppies growl and bark. Growling and barking are both verbs. (To growl and to bark)
Answer:
Due at 11:59
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Explanation:
The one you have selected is the correct answer.