Using the drop-down menus, answer the questions about cause-and-effect relationships.

What causes Robert to meet the number devil?
A: Robert’s friends introduce them.
B: The Number devil sneaks into Robert's room
C: Robert meets number devil in a dream

What is the effect of Robert's dream conversation with the number devil?
A: Robert is no longer able to sleep
B: Robert learns something new about math
C: Robert defeats the devil in a math contest