Respuesta :
According to the relation between all the options, the "underlined" word must be either scrutinised or studied. The correct answer is option A. Examine carefully.
The text is clearly about the Observation of alien beigns over humanity. In the context, scrutinise serves a similar function as study - as they are used together in a sentence: "...that as men busied themselves about their various concerns they were scrutinised and studied...". The aim is to describe men as subjects being analyzed and observed from a considerable distance.
As for the rest of the options, they are all out of context:
B. To question would mean to study a subject directly or in close inspection, using speech as a tool.
C. To take apart would mean to study a subject by means of surgery.
D. To magnify would simply mean to enlarge the appearance of an object, not necessarily in order to study it.
Answer:
I would say that the answer is a extreamely careful
Explanation: