Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'different-gender parents'?

A. Typically, a person nineteen years old or younger who has either given birth to or electing to parent a child with which there is some relationship.
B. Parents who are of different genders.
C. A parent, usually either biological or adoptive, who is legally considered as such.
D. A person who provides biological material (egg and/or sperm), but not necessarily genetic material, or otherwise assists in the creation of a child (such as carrying the pregnancy to term for an egg/sperm combo that is not their own).

Answer: Parents who are of different genders.