Although many people are bilingual or trilingual, those individuals with a high degree of proficiency in several languages are known as polyglots, while those with the ability to speak six or more are designated as hyperpolyglots. Recently, there has been considerable debate within the scientific community over whether the extensive linguistic capacities of certain people can be attributed to biological or behavioral factors.
why does the author mention "considerable debate" in paragraph 1?
B: To emphasize that researchers are uncertain about the origins of lingual abilities
C: To illustrate that the subject being addressed is thought to be controversial
D: To show that scientists are seldom able to reach a consensus on certain questions
B가 정답인데, C나 D가 답이 될 수 없는 이유가 무엇인지 궁금합니다.