____ is a type of marriage that is so rare that researchers have ...

[olgavictoria]

____ is a type of marriage that is so rare that researchers have not found even one society in which it has ever been the norm.
 
  a. serial monogamy
  b. polygyny
  c. group marriage
  d. polyandry
  e. communal living

Question 2

Why is the concept of multiple causation important in sociological research?
 
  What will be an ideal response?

[Beatricemm]

Answer to Question 1

C

Answer to Question 2

Events in the physical or social world are almost always too complex to be explained by any single factor. Therefore, the sociological researcher must be aware of the principle of multiple causation.

[olgavictoria]

Thanks for the timely response, appreciate it

[Chelseyj.hasty]

Excellent