A young man of Jewish affiliation moves to New York City to find a job. Seeing no reason to go it ...

A young man of Jewish affiliation moves to New York City to find a job. Seeing no reason to go it alone, he calls everyone he knows from both his mother's and father's side of the family, and attends various meetings to which he is invited. He is invited to multiple events and gatherings by virtue of his being related to various ancestors on both parents' side. These groups support him when he runs out of money and help him find an apartment and a job. We can say that he is a member of either a bilateral descent group or which of the following?
 
  a. Patrilineal
  b. Matrilineal
  c. Unilineal
  d. Cognatic
  e. Ambilineal