Cynthia is holding a sheet of paper that has a mass of 2 grams. She tears the sheet of paper into many small pieces. Which of the following is true?
a.Each piece of paper has a mass of 2 grams.
b.The sum of the mass of all the pieces of paper is more than 2 grams.
c.The sum of the mass of all the pieces of paper is less than 2 grams.
d.The sum of the mass of all the pieces of paper is 2 grams.