Tomorrow, Mrs. Wendel's class will be using toothpicks for a science project. Each student must use at least 5 toothpicks for the project. Mrs. Wendel knows that there is already a bag of 50 toothpicks in the class storage room. She plans to buy x additional toothpicks this afternoon to make sure her class will have enough.

If her class has 21 students, which number sentence represents this situation?

A. 1/21x + 2 8/21 ≥ 5

B. 1/21x + 1 4/21 ≥ 5

C. 1/21x + 2 8/21 ≤ 5

D. 1/21x + 1 4/21 ≤ 5