In Her Research Project,Ella Wants to Study the Processes Involved

Multiple Choice

In her research project,Ella wants to study the processes involved in lesbian partners adopting children.She starts off by interviewing lesbian couples who have adopted in the past,and they in turn,give her names of other lesbian couples who have adopted.The process by which Ella gets her sample is called

A) simple random sampling.
B) convenience sampling.
C) snowball sampling.
D) systematic sampling.
E) multistage cluster sampling.