Answer:
A university study by known sociologists that concludes welfare payments are insufficient
Step-by-step explanation:
In the following options given above, the university study by the known sociologists tends to hold more weight than a gruop of survey carried out.
This is because, in survey, the responses are subjective to the mood and personality of the respondents whereas in the university study carried out by the sociologists, it definitely follows a laid down experimental process before the result was arrived at.