Which story problem can be represented by the expression 9 + 5 ?
  1. Oliver has 9 candies to share with 5 friends.
  2. Aarav bought 9 balloons and lost 5 in the wind.
  3. Oceana planted 9 rows of trees with 5 trees in each row.
  4. There are 9 kids on the playground and 5 more arrive.
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Can you answer 10 correctly?