I think it is because of a varicose ulcer, might not be right though
Yellow Marrow is common in the skeleton in old age but not in a childhood skeleton.
Answer:
If you are talking about websites, then yes. Website ending with .gov for government or .org are always reliable.
Explanation:
But if you aren't talking about websites, this question is questionable due to your experience of government issued information. But for the most part, government information are always reliable.
B. I believe if not B. that it has to be D.