Please choose the correct answer to the question: Dawn brought a chocolate bar for lunch, but the chocolate melted in her backpack. Dawn wants to perform a scientific investigation to determine the reason her chocolate bar melted in her backpack. Which hypothesis should Dawn use for her investigation?

Answer1: Chocolate will taste better when melted. Answer2: Chocolate will taste the same even when melted. Answer3: If the chocolate is broken then the chocolate will melt. Answer4: If heat is added to chocolate then the chocolate will melt.

Answer format: answer1/answer2/answer3/answer4