Which of the Following Is NOT an Example of Plagiarism

Multiple Choice

Which of the following is NOT an example of plagiarism?

A) Andile buys an assignment on the internet and turns it in as his own work.
B) Lunga borrows a tune from another band and incorporates in his own songwriting without permission.
C) Mandla gives a speech that he got from a book of famous speeches, and acts as if it was his writing.
D) Simphiwe fails to prepare for a multiple-choice test and chooses answers randomly.