Read the following article and answer the question by choosing from the options.

Caretaker positions at state run hospitals are typically low paying . According to the Bureau of Labor Statistics health aides make , on average $ 10.03 per hour or $ 20,850 a year . The technicians at Cherry Hospital make on average about $ 25,000 per year , which is slightly above national average but still low considering the demands of the job .

Why does the text use data provided by the Bureau of Labor Statistics to substantiate the argument that caretaker pay is low at state run hospitals ?
Select from: (a). It is the only source that has comprehensive statistics on hospital caretaker pay . (b). It is an arm of the US Department of Labor and thus seen as a reliable source . (c). This source is the one that is utilized most widely in research fields (d). Retrieving statistics from this entity is free of charge and easy to download...A:
(b).