Marlene’s desk becomes so messy that on occasion she cannot find an important paper she is looking for. After several incidents in which she suffered the consequences of not finding a paper she needed (e.g., a homework assignment), she learned to organize and straighten her desk. Now the distress of being unable to find what she needs has been eliminated. Marlene learned this new behavior through which operant conditioning procedure?
A. Positive reinforcement
B. Negative reinforcement
C. Punishment
D. Extinction