Final answer:
The number cubes Leon will toss are labeled from 1 to 12. This information aligns with the experiment described in the reference material, which uses two 12-sided dice. The correct answer is option c.
Step-by-step explanation:
The question asks about the labeling of number cubes that Leon will toss. Based on the context provided, the correct answer is that the number cubes are labeled from 1 to 12. This information comes from the reference material indicating that an experiment consists of tossing two 12-sided dice, and the sides of each die are numbered from 1 through 12.
To further clarify, traditional number cubes or dice are normally 6-sided and labeled from 1 to 6, so option a would represent a standard pair of dice. However, the reference material specifically mentions 12-sided dice, which eliminates options a (1 to 6), b (1 to 4), and d (1 to 8) as they do not correspond to the characteristics of dice used in the provided context.