Positively feeling answer A.
Answer:
D Well-Read
Explanation:
Because his assistant is uneducated.
Answer:
These researchers are most likely specialist in historical linguistics or diachronic linguistics.
Explanation:
Historical linguistics is the area of linguistics that focuses its study on language grouping into family.
The typical noun corresponding to the verb "to agree" is agreement.
If you want to refer to the process of a agreeing however, it's "agreeing" , as in "agreeing to this treaty is not easy".