Answer: 1. Energy drink
2. What people prefer to drink.
Step-by-step explanation:
1.The independent variable can be referred to that variable that can be manipulated in an experiment. The energy drinks can be changed to see that what people prefer to drink.
2.The dependent variable can be referred to that variable which is the result of the experiment it is influenced by the independent variable. What people prefer to drink is the dependent variable.
3.The data being collected in this experiment will be quantitative. As we can calculate the response of people what they prefer to drink in numbers.