Read the excerpt from "The Red-Headed League."Then Wilson told us that his assistant spent a lot of time in the cellar. When I saw that there was a bank right behind the store, I thought immediately of a tunnel. When Spaulding opened the door to the store with dirt on his knees, I knew I was right. Spaulding and Ross were digging a tunnel from the pawnbroker’s house to the bank.
A cellar is an underground room, usually used for storage. The excerpt says Spaulding spent time in the cellar, so the matching choice is “a basement.” An attic is above the main floors, not underground.
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