I think it is b yyyyyyyyyyyyyy
Answer: Our paper's science writer, whose column I read every week, recently reported on exoplanets.
Explanation: There are three ideas here.
1. Our paper's science writer
2. They recently reported on exoplanets
3. How I read their column every week.
Two of the ideas are included in the sentence (1 and 2), and the last simply needs to be modified.
"Whose" is a determiner and associates things with other things. In the last idea, we associate their column to them: whose column... Then, we add how I read it every week and say, "...whose column I read every week."
Yes how do you want me to do it
D. Setting. it constantly described the kind of night it was and why it would be easy to go skating.
