According to the text, what is the purpose of the preliminary bibliographic survey in a research? The preliminary bibliographic survey helps to de...

According to the text, what is the purpose of the preliminary bibliographic survey in a research?

The preliminary bibliographic survey helps to delimit the research topic.
The preliminary bibliographic survey is used to make notes on the readings.
The preliminary bibliographic survey is used to collect primary sources for the research.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) I and III are correct.