The teachers present at the teacher's lounge could be there for a variety of reasons, for example it could even me a meeting of the supporters of the school uniform! his sample is therefore possibly biased - there is no way of knowing that it represents the whole population. He chose it because it was convenient to him - and the answer is "a, convenience sampling"
I believe the answer is C, request for proposal (RFP), though feel free to correct me if I'm wrong
Family therapy perspectives call for a conceptual shift from evaluating individuals to focusing on system dynamics. The family therapy involves working whit individuals, partners and families. She has systemic approach to individuals and families-family is a "whole". The change in behavior in one family member affects other members. In this way come to changes in the entire family system.
None of it was Independent :)
