Which of the following is one area of ethical concern on a content curation site?

A) Presenting someone else's content as yours
B) Filtering materials
C) Targeting a specific audience
D) Incorporating articles,video,and other media
E) Using a dedicated website

Presenting someone else's content as yours is a major ethical concern on a content curation site as it is considered plagiarism and unethical. It is important to properly credit the original source and give them due recognition.

Other options may also have ethical implications, but A is the most clear and direct concern.