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Penelope is having a party for her friends. She invited ten friends and seven have said they will come. Three of Penelope’s friends haven’t responded yet. Penelope needs to buy party supplies. Which sentence below is true of this situation?



A. Penelope needs to buy ten of every party supply.

B. You don’t know how many supplies Penelope will need.

C. Penelope will need only seven of every party supply.

D. Penelope needs 3 more of every party supply

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