Which is most likely to be the next letter in this sequence? w, t, f, s, s, m, a. the letter w b. the letter s c. the letter m d. the letter t e. the letter f

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?