Task: Class Definition Understanding (ontology: Arts_Media_Entertainment/Propp)

Which of the following definitions best describes 'BiolBrother'?

A. is a subclass of brother. Each member of this class has gender male and at least one biological sibling.
B. is a subclass of brother. Each member of this class has gender male and at least one stepsibling.
C. is a subclass of biological parent and of father. Each member of this class has gender male and at least one biological child.
D. is a subclass of biological child and of daughter. Each member of this class has gender female and at least one biological parent.

Answer: is a subclass of brother. Each member of this class has gender male and at least one biological sibling.