Which of the Following Is an Example of Regression Toward

Which of the following is an example of regression toward the mean?

A) People who originally score near the average on some trait are measured a second time, and their new score falls at the extreme high or low end of the scale.
B) People who originally score extremely high or low on some trait are measured a second time, and their new score falls closer to the average.
C) People recover from a mental or physical illness without any form of intervention.
D) People's expectations lead them to experience some change, even though they receive a fake or ineffective treatment.