Answer:
Convenience sample
Explanation:
A convenience sample is a sample where subjects are selected because of their proximity to the researcher. The person gathering the information has easy access to this sample and that's why it's chosen.
In the problem, Martina asks her parents, grandfather, brother, uncles and sorority sisters, in other words, she chooses the people who are closer to her and that will be easy to have access to for the interviews. That is why this is an example of convenience sample.