Answer:
Marina used a convenience sample.
Step-by-step explanation:
Convenience sampling is a form of non-probabilistic sampling, it doesn't use statistical methods to choose the participants of the study, instead, the researcher selects the participants who are conveniently available for the study. Convenience sampling is often used in the exploration stage of the research, for example, when the researcher is designing the data collection instruments.
In this case, Marina used a convenience sample for her study because she asked the people that were close to her, some family members and a few friends.