D, as 'Gerunds' is a verb and normally ends with ing in the present tense :)
A because this is the first Christmas that we have not needed to economise
Who is she. I don’t know
Where is he calling from.
Because your mother has told you to go
Hey there!
Based on how (Elizabeth) react's and talks to this person, it seem's to be more "logic" than anythings else. This seem's to be reasoning on what the person is doing.
To state out some quotes from the passage: <span>we have entirely determined not to marry an absent husband; and that we shall give you no certain reply until we shall have seen your person.
The quote that was brought out that is listed above is what I wanted to explain. It seems like (Elizabeth) is pointing something out for this person to help this person in what she is going to do. She is giving "logic" reasoning to this person.
This is why I believe that your correct answer would be "logic".
Hope this helps.
~Jurgen</span><span />