It helps a researcher to better code the data and to find/organize illustrative examples of code pieces.
So C can be ruled out as its incorrect due to the fact that if most readers would agree then one could logically assume they know about the topic.
That leaves a b and d.
B seems to be the most correct as you always want to state the points before making your main idea.
You can't build a house without a foundation !
Possible answer:
Passage two and passage three
This is a very good question
