“Plagiarism “ means the practice of taking someone else's work or ideas and passing them off as one's own, which means a theft of someone else’s writings, hence option B is the correct answer.
Option A is incorrect because “facsimile” means an exact copy, especially of written or printed material, which is not the same as plagiarism because plagiarism involves a facsimile.
Option C is incorrect because “forgery” means the action of forging a copy or imitation of a document, signature, banknote, or work of art, this is incorrect because forging includes all types of documents and signatures, while plagiarism includes someone’s written work only.
Option D Is incorrect because “parody” means an imitation of the style of a particular writer, artist, or genre with deliberate exaggeration “for comic effect”, hence it is definitely incorrect.