The Fowl in the Pot by Stanley J. Weyman (excerpt)

Arriving at a house, which, if we might judge in the darkness, seemed to be of rather greater pretensions than its fellows, our guide stopped, and whispered to us to mount some steps to a raised wooden gallery, which intervened between the lane and the doorway. On this, besides the door, a couple of unglazed windows looked out. The shutter of one was ajar, and showed us a large, bare room, lighted by a couple of rushlights. Directing us to place ourselves close to this shutter, the innkeeper knocked at the door in a peculiar fashion, and almost immediately entered, going at once into the lighted room. Peering cautiously through the window we were surprised to find that the only person within, save the newcomer, was a young woman, who, crouching over a smoldering fire, was crooning a lullaby while she attended to a large black pot.

Which word best describes the tone of the excerpt?

A.
troubled
B.
mocking
C.
frustrated
D.
mysterious