Klaus Attends Class in a Small Room That Is Next

Klaus attends class in a small room that is next door to the music practice room. His final exam is taken in a large but very quiet room. Klaus is likely to:

A) Not do as well on the exam compared to if he had taken it in the original classroom
B) Do much better than if he had taken it in the original classroom as it will be quieter and less cramped
C) Do just the same regardless of which room he takes it in
D) Only do well on questions asking about music