Answer:
A). The illegal practice of passing the work of another as one’s own work.
Step-by-step explanation:
Plagiarism is demonstrated as illicitly copying or using ideas, text, or any other creative work of someone else and presenting them as one's own without appropriately acknowledging or citing the source.
As per the question, option A best displays the definition of 'plagiarism' as it appropriately defines and describes it as 'the illegal practice of passing the work of another as one’s own work'. Such practice is considered illegitimate or unlawful as it involves imitating someone's creative ideas or expressions without admitting or acknowledging any credit to the person(whose ideas have been stolen or imitated). Thus, option A is the correct answer.