안녕하세요 선생님!

reading series 2 set 2-3문제에 관하여 질문이 있습니다. 

paragraph 7

Finding this hearth is a daunting task, as

reconstructing even a small branch is complicated.

A complicating factor is that with human mobility,

languages did not merely. diffuse through static

populations; they also spread by relocation

diffusion : If people with different languages have

consistent spatial interaction, language

convergence can take place, collapsing two

languages into one. This creates problems for

researchers because the reconstruction rules

sometimes do not apply and can be unreliable.

책 18페이지 문제 12번

According to paragraph 7, convergence makes

the study of language difficult because

(A) it changes a language into two different

languages.

(B) it allows relocation diffusion to take place.

(C) it makes an exception to a rule of

relocation diffusion.

(D) it uses the unreliable rules of

reconstruction,

paragraph 7 is marked with an arrow [→],

선생님께서 d가 안되는 이유가 convergence가 규칙을 이용하는 것이 아니기 때문에 틀리다고 하셨는데, 그럼 굳이 저 규칙을 이용하는 것을 찾자면 researcher가 되는 건가요?

감사합니다!