Implicit discrimination: refers to the discriminatory understanding of specific groups that exist in people's minds and has not been publicly revealed. Which of the following is implicit discrimination? ['Middle-aged men wearing sunglasses entering a residential area are more likely to be stopped by a security guard and questioned.', 'People with beards and weird outfits are often regarded as artists.', 'People with straight suits and shiny shoes are often considered successful.', 'Beggars dressed as out-of-school teenagers often get more money.']