Correct Answer: D. Heavier for new employees
The answer would be D the year the source was published.
I could be the letter C or A
vigilant, wide awake, aware, watchful, attentive, observant, circumspect, wary, chary, heedful, canny
example;
broad topic: Depression
narrowed topic: what causes depression?
Targeted question: What studies in the past have shown a direct correlation between substance abuse and depression?