Kim purchased white vases, red vases, and flowers to create center pieces for an event. The flowers cost a total of $397 and each vase cost $9. If w and r represent the number of white and red vases purchased, respectively, which of the following expressions represents the

total cost of the centerpieces?

1. 9w+9r+397

2. 9 (w+r+397)

3. 9 (w+r) + 397

4. 9w+r+397

A. 1 and 3 only

B. 2 and 4 only

C. 1 only

D. 1, 2, and 3 only