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C is the correct answer. None of the other answers have proper verbs
In MLA format, when you directly quote, paraphrase, or summarize an outside source, you must always use in-text citations.
In MLA formatting, an in-text citation is used to tell readers that information comes from a different source.
If there is more than one source of information, then you must provide a citation at the end of the document.
In paraphrasing, you express the idea of another author or scholar in your own words.
While giving in-text citations in MLA format, one must provide the author's last name and page number in the text while a detailed citation should be given at the end.
If you need to learn more about MLA format, click here:
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World to wide I think not that sure
The correct answer is D, this is 'present perfect' tense. It is formed with the use of the verb HAVE in present simple tense (so, HAVE/HAS), and the past participle of a verb (or the third column of irregular verbs).
A cannot be correct, because then it would say - I hear.
B cannot be correct, because then it would say - I had heard.
C cannot be correct, because then it would say - I heard.
And since there is also HAVE HEARD, the correct answer has to be D.
