Which of these represents a blind experiment?

• a.)
• Asking a group of adults about the candidate they will vote for in the presidential elections.
• b.)
• Asking a group of girls to compare the tastes of chocolate without revealing the names of the brands.
• c.)
• Asking a group of car drivers to choose their favorite car from a list of 10 cars.
• d.)
• Asking a group of students about their favorite movie from a list of five movies.