Sheila and Kevin are helping their science teacher design a lab exercise about gravity in the universe. The simple set-up requires the use of two softballs. Ball t has nothing attached to it. Ball 2 has a long string connected to it. The first step of the activity is to throw Ball 1 in a straight line down the hallway to model a planet that is not affected by the Sun's gravity. What should be done in Step 2 to model the Sun's effect on a planet? A The ball is thrown around the body while holding on to the string. B The ball is thrown around the body with the string trailing behind. C The ball is thrown in a straight line while holding the string. D The ball is thrown in a straight line with the string trailing behind.