In a certain game, players take turns rolling dice and moving around a board according to their rolls. Before rolling, players can choose which particular die they want to use. The dice names and the numbers on each of their 6 sides are given below:

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.