The following table shows Quinton's preference ranking for different brands of boots in both 2011 and 2012.His preferences are ranked from 1 to 4,where 4 is his most-preferred brand and 1 is his least-preferred brand.In 2011,one of Quinton's 10 close friends owned a pair of UGG boots.In 2012,six of Quinton's 11 close friends owned a pair of UGG boots.Based on this information,which effect would likely explain the change in Quinton's preference ranking for UGG boots from 2011 to 2012? 
Definitions:
Self-Harming
Deliberate infliction of pain or injury on oneself, often as a coping mechanism for psychological distress.
Drugged
The state of being under the influence of drugs, especially those that impair physical or mental function.
Physiological Stability
The state of having stable internal bodily functions and processes necessary for health and survival.
Rape Evidence
Physical or testimonial evidence collected in investigations related to a sexual assault, often used in legal proceedings.
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