Final answer:
After Group 2 (-12) presents, the next group to present is the one with the next lowest number; Group 3, with a number of 1/2, will be the group to present next, making the correct answer C. Group 3.
Step-by-step explanation:
The question involves determining the order in which groups will present in Mr. Posillo's class, based on the numbers they have drawn. Group 2 was the first to present because they drew the lowest number, which is -12. To find out which group will present next, we must identify the group with the next lowest number. Looking at the numbers for each group: Since Group 3 has the lowest number after Group 2 (1/2, which is larger than -12 but lower than the numbers of the other groups), they will be the ones to present next. Therefore, the answer is C. Group 3.