A scientist investigating electrically-charged objects has decided to test if the number of times you rub a cloth against a balloon increases the amount of time it will stick to the wall. She wrote down her variables in a table. Variable Description Test The numbers of times she rubbed the cloth against the balloon Outcome The length of times the balloon sticks to the wall Control The cloth used in the experiment What would be her hypothesis for this experiment? a. If you stick the balloon to a wall, then it will become electrically charged and stay there for a long period of time. b. If you change the cloth used to charge a balloon, it will increase the amount of time the balloon will stick to a surface like a wall. c. If you increase the number of times you rub the cloth against the balloon, then the balloon will stick to the wall longer. d. If you rubbed the balloon with a different object, like a piece of paper, then it will stick to the wall for a shorter period of time.