Neuroscientists are excited by technological progress that facilitates brain mapping, the most ______ of them comparing their growing abilities to tremendous advances that led to unimaginable success of the Human Genome Project.
a. rigorous b. sanguine c. punctilious d. unorthodox e. sophisticated
답이 b인데 them 이 뭘 가르치는지가 중요한 것 같은데, 저는 them을 기술의 진보라고 생각하고 e를 골랐습니다. them 이 technological progress 인지 neuroscientists인지 어떻게 구분할까요..?