Severus's first job was Potions Master. He was chosen for this position after enduring a grueling, year-long training regiment. Severus spent that entire year broke and miserable. However, after he was selected to be Potions Master, he viewed this job as even more valuable and desirable. Severus's shift in thinking best illustrates __________. Question 18 options: postdecisional dissonance justification of effort insufficient justification the central route