Indicate which of the statements below are true. I - A same study can have an infinity of data sources. II - The target population of a research c...

Indicate which of the statements below are true.

I - A same study can have an infinity of data sources.
II - The target population of a research consists of those entities that have the characteristics of the conclusion to be reached in the research.
III - In general, the research problem and the research variables involved have no relation to the empirical data sources necessary for their execution.
IV - Not every type of document, even if properly analyzed and systematized, can serve as a data source for scientific studies.
A) Only sentence IV is true.
B) Sentences I, II, III and IV are true.
C) Only sentence I is true.
D) Only sentences III and IV are true.
E) Only sentences I, II and IV are true.