The correct answer is A.
An internet search would show the full sentence quoted in A verbatim. Plagiarization means to take unlawfully and present another person's ideas and or words as one's own without acknowledging the source.
Notice that in<em> option B</em>, the name of the writer Carson, is written at the end of the sentence thus acknowledging the source of the information. This is called In-text citation. The format used in <em>option B</em> is closest to the MLA method for citing text from web pages with no date. MLA style stands for the style for referencing which was developed by Modern Language Association.
If the information was paginated, then the citation should have ended with something like (Carson 96). Where 96 is the page number from where the excerpt is cited.
<em>Option C </em>is also in compliance with the principles of in-text citation. This also bears semblance with another method of MLA style of in-text citation.
<em>Option D </em>also acknowledges the person author of the information. Notice that the sentence starts with "According to..."
Recall that to plagiarize is to appropriate another person's work to one's self. When the source of an idea or words or text is not cited, then the indirect implication is that the reader assumes that the work belongs to you.
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