单项选择题

Passage One
Questions 26 to 29 are based on the passage you have just heard.

Why do many adoptees find it hard to make the decision to search for the birth parents()

A.They generally hold bad feelings towards their birth parents.
B.They do not want to hurt the feelings of their adoptive parents.
C.They have mixed feelings about finding their natural parents.
D.They are fully aware of the expenses involved in the search.