Gandalf believes that he is the only Wizard who takes time to clean his wand and secure it safely after every use. In reality, this is a practice common to all Wizards. Wand hygiene and safety are mandatory courses for Wizards during their training. Unfortunately, Gandalf is clearly experiencing the _______. a. Overconfidence Effect b. Self-Serving Bias c. False-Consensus Effect d. False-Uniqueness Effect