N class, Mason learned that the Sun is very large, but it looks small because it is very far from Earth. Mason designed a test to study the effect of distance on the apparent size of an object. First, Mason had his friend Sarah hold a ball above her head. Then, he took five steps away from Sarah and held a ruler up in front of him to measure how big the ball looked to him. Mason took more measurements at 10 steps away and 15 steps away. The picture shows how Sarah and the ball look smaller when Mason is farther away. After Mason finished taking the three measurements, he repeated all the measurements two more times. His data is shown in the table. Why did Mason take three sets of measurements at each distance? A. He had to measure using three different balls. B. It helps people trust his data more. C. Measurements can only be made in groups of threes. D. He wanted to measure using three different rulers. Reset Submit