The green supernova is still __________ cosmetologist , as it has never been seen clearly , making it impossible to study its nature .

A. Admiring for

B. Enigmatic to

C. Dangerous to

D. Famous among

Option B : this sentence has a cause and effect relationship as indicated by the word “
as “ If the green supernova “ has never been seen clearly “ once could logically conclude
that it would be “ enigmatic “