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

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

A. Engaging in activities typically associated with adulthood.
B. Having a null or neutral gender (being neither male nor female), and having or seeking to have no or reduced signs of physical sex.
C. The practice of groups of men who target overweight or obese women, typically for sexual encounters. Unlike fat fetishists, men who participate in the instance are not necessarily sexually attracted to obese women's bodies; they aim to take advantage of a female's stereotypical low self-esteem or to derive amusement for themselves and their friends by engaging in sexual activities with women who are overweight.
D. An event to raise awareness and visibility of lesbian, gay, bisexual, transgender, and queer (LGBTQ) people and issues of LGBTQ rights in the US, it was held April 28 through April 30, 2000 in Washington, D.C. A march from the Washington Monument to the front lawn of the United States Capitol took place on April 30, where the crowd was addressed by several members of Congress and, via video, by President Bill Clinton. Estimates of attendance ranged from 200,000 to 1 million people. The event was criticized for a lack of inclusiveness and political focus as well as concerns over financial accountability. Allegations of theft from a vendor and severe financial mismanagement arose after the event. The final accounting showed the event ended with $330,000 in unpaid debt. In terms of the expense per participant, it was the least cost-efficient of any national LGBTQ march to date.

Answer: Engaging in activities typically associated with adulthood.