Which of the following wouldn't constitute plagiarism?
a) paraphrasing an article from a medical journal.
b) constructing a personal narrative without research.
c) borrowing idea structure from an essay on hockey.
copying and pasting from an internet article on pets

The option that wouldn't constitute plagiarism is B.

All the other choices would be considered a form of plagiarism.  

Hopefully this helps and good luck.

obama was told in early july 2004 that he was chosen to deliver the address, and he largely wrote the speech himself, with later edits from the kerry presidential campaign.