In the beginning the reason is for none at all
The only conjunction in this sentence is C) but.
All of the other options are prepositions, not conjunctions.
According to the excerpt, the option that identifies an implicit meaning one could draw from it would be the second one: "Locke is unfamiliar with the term <em>idea</em>".
In the excerpt, Locke is not asking what Idea is nor is he being uncertain about the relationship between speculative and practical ideas. He seems to never heard it before and the exact meaning fades away.
That's why he asks what it represents and not its definition or for someone to repeat the explanation. He just needs an example to clarify the boundaries of the <em>idea's</em> meaning.
It could mean that he wants to prevent his son from seeing the monkey's paw.
This is simple you would divide 2 by 5 which is 0.4
<u>The answer is 0.4</u>