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

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

A. A rare synonym for nymphomania.
B. Term proposed to cover a variety of gender identity related conditions, including non-transgender cross-dressing behavior, being transgender and not following a course of hormones and surgery, and being transgender and following a prescribed course of hormones and surgery (which was then referred to as transsexualism).
C. An archaic and historical term for homosexuality.
D. An outdated and offensive diagnosis which posited that not all transgender people are "truly" transgender (or transsexual). Sometimes used and shortened to "trutrans" by some transgender people who wish to elevate themselves above other trans people for any of various reasons.

Answer: An archaic and historical term for homosexuality.