The wooden chairs effect means that two groups of students with equal grades are arranged to study on comfortable sofa chairs and very uncomfortable wooden chairs respectively. Soon, the academic performance of students sitting on wooden chairs is much higher than that of students sitting on sofa chairs. The reason is that students sitting on wooden chairs constantly adjust their sitting posture for discomfort, which seems to be restless and active on the surface, The essence therefore supplies more blood and nutrition to the brain. The learning effect of students sitting on sofa chairs is worse, because they are comfortable and motionless, resulting in a relative slowdown in blood circulation and a relative reduction in blood and nutrition for the brain.
According to the above definition, which of the following best reflects the wooden chair effect?
A month after moving into the new study, Xiao Ming's grades and ranking rose all the way.