Which of the following statements about the Nayar is correct?

Which of the following statements about the Nayar is correct?
 
  a. When a Nayar girl reaches the age of menstruation, she leaves her home and goes to live with her husband.
  b. The Nayar girls brother is always considered the legal father and primary supporter of her children.
  c. The men with whom a Nayar woman enters into formalized sexual relationships become obligated to support her and her children economically.
  d. A man must give a Nayar girl gifts three times a year to formalize the sexual relationship.
  e. The Nayar women raise their female children, while the Nayar men raise the male children.