Answer:
The student text is not plagiarized because it correctly attributes the information to the source (Jennifer Armstrong) and provides a proper citation with the page number (Armstrong 2). However, it should use quotation marks to enclose the verbatim text taken from the source to indicate that it is a direct quotation. So, the student text should be revised to include quotation marks around the quoted text, like this:
"Prior to the nineteenth century, Antarctica was just 'a rumor, an undefined, unseen question mark shrouded in fog and surrounded by ice'" (Armstrong 2).
With this correction, the student text would be properly formatted and not considered plagiarism.
Step-by-step explanation: