The conclusion : Therefore, the data from a University research regarding the population of Malta must be accurate since it differs from the data presented by the news media groups.
The argument above is flawed since it makes the questionable assumption that
A.
The university research data is more accurate than the data presented by news media group. - (A) suggests that data from both the university research and the new media group are accurate, but the university research data is more accurate. This contradicts the conclusion. Hence,
eliminate (A)B.
The government source in Malta has obtained the Malta population data primarily from University research. - Irrelevant. hence,
eliminate (B)C.
Both media group data and University data have used different surveys to gather the data. - Irrelevant. hence,
eliminate (C)D.
The data presented by the media groups cannot be partly accurate. - the passage mentions only two possibilities regarding accuracy: Either a data is accurate or inaccurate. the third possibility 'partly' accurate does not exist. Hence,
eliminate (D)E.
Data presented by media news groups and university data cannot both be inaccurate at the same time. - It is certainly possible that both the media news groups and the university data can be inaccurate. To arrive at the conclusion, the author has assumed that both cannot be inaccurate (since he claims that the University data must be accurate).
(E) is the assumption that we are looking for. Hence,
(E)is the right answer