The correct answer is (c) A website that is from a professor at university.
The most reliable source for a student who is using internet to conduct scientific research, the website that she should use must be trustworthy. The knowledge should be upgraded, authentic and useful. The best source of this knowledge can be a website which is owned by a professor.The website will have a long base of knowledge, much more than what a student knows. So, Fei Yen should use a website that is formed by a professor.
