Sequoia took her pals Anthony, Ariana and Tyler to buy her first new car after passing her NCLEX with flying colors and getting a prestigious job in Mott Hospital's NICU. She went for a test drive for the newest Tesla. The test drive was awesome, setting the standard by which she could compare the car that was eventually delivered to her. The test drive is what Sequoia expected should happen as the driving experience for the car that would eventually be delivered to her house. The test drive is thus her: Positive control Placebo Negative control Experimental subject