Matthew, a vibrant leader, heads a team that launches new products into the market. During a follow-up test of an electric-car prototype produced by his company, the researchers find a problem with the engine of the car and request Matthew to halt the launch. However, Matthew goes ahead, and his company earns a bad reputation in the market because of the defective product. In the context of Janis's groupthink symptoms, which of the following symptoms led Matthew to make the wrong judgment? A) mindguards
B) unanimity illusion
C) invulnerability illusion
D) stereotyped view of the opponent