Here's a problem to solve: A student mixed 25 grams of salt into 1,000 grams of water. What is the mass of the saltwater mixture?

Among the 4 following options, which is the correct answer?

- A: 975 grams
 
- B: 1,000 grams
 
- C: 1,025 grams
 
- D: 2,500 grams
 