Once Upon a Time, a Student Who Conducted a Literature

Multiple Choice

Once upon a time, a student who conducted a literature review relied solely on information from Wikipedia. Why might this result in her tutor criticising her work?

A) She had not used the primary sources in which the research was published
B) She had relied on someone else's summary of the research studies
C) Her selection of studies to review was limited to those chosen by someone else
D) All of a-c