Answer: option.C.
Explanation:
Before anything take note of this word in the question ' individual'. So, according the the question, the whole class were given assignment and were told to solve the assignment individual, no collaboration.
What the two students did, that is, Chi and Juan, is unethical, to collaborate when they were not asked to do so, it is an academic dishonesty.
From the question; Chi compiles research notes, Juan identifies the main findings, and both write their own original research papers and this makes it to fall under plagiarism too. So, option C is correct.
