Read these lines: "It was close upon four before the door opened, and a drunken-looking groom, ill-kempt and side-whiskered, with an inflamed face and disreputable clothes, walked into the room. Accustomed as I was to my friend's amazing powers in the use of disguises, I had to look three times before I was certain that it was indeed he." What can be inferred from the quoted lines?

1. The narrator says he is accustomed to his friend's powers of disguise, so he is not a newcomer to them. 2. Even so, he had to look three times before he was sure who had walked in. 3. A disguise that holds up against a practised eye three times over is a very good one. 4. So the inference is that the disguise fooled someone who knew the man well, option A. 5. The second choice contradicts the word accustomed, which says the opposite. 6. The third choice treats the groom as a separate caller, but the last sentence names him as the friend himself. 7. The last choice takes drunken-looking at face value, yet the look is the disguise rather than the man. _Source: Arthur Conan Doyle, The Adventures of Sherlock Holmes (1892), A Scandal in Bohemia_