Yes you are correct. You make inferences based on your knowledge and experience. What you read and what you're taught builds your knowledge and what you experience builds your wisdom
My guess would be A.<span>It causes the lines to stand out so the reader reflects on their importance. But I'm only 98% sure on that so don't just rely on my answer lol. I still hope it helped a bit! Good Luck! :)</span>
(B) The walk around Saxe-Coburg Square
is the key event in story which leads to Holmes' solution of the case.