The meaning of the word "attribute" is a characteristic feature by which something is distinguished: this is the correct answer. It does not have to be positive or negative: it can be either (benefit and asset would be only positive).
A subject complements always follow c. A linking verb hoped it helped :)
It is an appeal to Ethos as it comes from a point of authority of knowledge on a subject.
Answer:
C. What level of interest do my readers likely have in my topic?
Explanation: