Background information: This account of the fall of Jerusalem in 1099 was written in 1231 by a Muslim historian who traveled with Saladin's army. The author of this account is a . As a result, his account is likely to be towards the Muslims who lost their lives. His account is likely , because he was not a witness to the event.

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.