Final answer:
The conclusion that the British National Library is in the United Kingdom follows logically from the statement given, as it is expected that a nation's library is located within its own country. The correct answer is option A.
Step-by-step explanation:
The statement "The British National Library has the largest collection of publicly-owned books in the United Kingdom. Therefore: The British National Library is in the United Kingdom." implies that the British National Library is located in the United Kingdom because it holds the largest collection of publicly-owned books there. Given this context, Conclusion Follows (A) is the appropriate response. It's logical to infer that the national library of a country would indeed be located in that country. However, it is worth noting that despite the logic behind the conclusion, the statement itself is somewhat tautological since the "British National Library" by definition would be in Britain, which is part of the United Kingdom.