Anna heated 15 g of Substance A to obtain 5 g of Substance B, 4 g of Substance C, and a certain amount of Substance D. Which statement is correct?

1. The mass of Substance D was 10 g less than the mass of Substance A.

2. The mass of Substance D was 1 g greater than the mass of Substance B.

3. The mass of Substance A was equal to the total mass of Substance C and Substance D.

4. The mass of Substance A was equal to the total mass of Substance B and Substance D