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

Which of the following definitions best describes the instance 'fluid bonding'?

A. A bisexual woman who engages in a sexual, but usually non-romantic, relationship with a heterosexual couple.
B. A child living in a polyamorous household.
C. A person who is bisexual, polyamorous, and a switch or versatile.
D. A process during which two sexual partners exchange body fluids with one another; an agreement in which sexual partners agree to have unprotected sex only with one another; alternatively, unprotected sex in general.

Answer: A process during which two sexual partners exchange body fluids with one another; an agreement in which sexual partners agree to have unprotected sex only with one another; alternatively, unprotected sex in general.