Here's a problem to solve: In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?

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

- A: 100% purple flowers
 
- B: 100% white flowers
 
- C: 75% white flowers, 25% purple flowers
 
- D: 25% white flowers, 75% purple flowers
 