The slate was set in a wooden frame decorated with red and green stripes. In one corner there was a small hole in the frame for the string to which the slate pencil was tied. . . . The abacus also had a wooden frame, with a handle like a hornbook. The beads of different colors were strung crosswise on copper wires with space to move them back and forth. —Barrio Boy, Ernesto Galarza Based on the details in the passage, what was Ernesto’s classroom like?

A.)dull and boring
B.)colorful and inviting
C.)frightening and strict
D.)colorless and sad