Someone is in depresssion then reply me

In the diagram, which must be true for point d to be anorthocenter? o be, cf, and ag are angle bisectors.be 1 ac, ag 1 bc, and cf 1 ab.be bisects ac, cf bisects ab, and ag bisects bc.be is a perpendicular bisector of ac, cf is aperpendicular bisector of ab, and ag is a perpendicularbisector of bc.

Does anyone know how to do this and can urgant it was due like 2 weeks ago

La próxima semana lupe el examen de ingreso. a. voy a dar b. va a dar c. vamos a dar d. vas a dar