Answer:
Option C
Step-by-step explanation:
Editorial blogs are usually written by people who may or may not have an educational background related to the topic being published.
Also, these blogs contains general statements depicting the understanding/experience of the person which he/she has gained while working in a certain field. These statements are neither tested nor vetted through scientific procedures and experimentation.
Thus, such blogs cannot be considered as scholarly articles.
Option C is correct.