Task: Instance Description Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes the instance 'bareback'?

A. A person whose sexual orientation appears to change from heterosexual to gay after consuming three alcoholic beverages.
B. Slang term referring to anonymous sex taking place in public restroom facilities or cruising for sexual partners therein.
C. An older bear who facial and body hair are predominantly or entirely white or grey.
D. Sexual activity without the use of a condom.

Answer: Sexual activity without the use of a condom.