Luisa's aunt has decided to put her baby up for adoption, but she has to decide what type of adoption she wants to pursue. After the baby is born and adopted, she does not want to stay in contact with the parents and does not want the baby to know her as her birth mother. She would like privacy. Which type of adoption would be the best choice for Luisa's aunt?

A closed adoption
A flexible adoption
An adoption by relative
An open adoption