Which situation could this expression represent?

(9+6)÷3

A: Conrad has 9 marbles and loses 6 of them. Conrad divides the number of marbles left evenly among 3 friends. How many marbles does each friend get?
B :Barton divides 6 marbles evenly among 3 friends. Then Barton finds 9 more marbles. What is the total number of marbles that Barton has?
C:Stella has 9 marbles and then finds 6 more marbles. She divides the total number of marbles evenly among 3 friends. How many marbles does each friend get?
D:Lizzie collects 9 marbles for each of 6 months. Lizzie divides the total number of marbles evenly among 3 friends. How many marbles does each friend get?