An igneous rock that you are analyzing contains the mineral zircon. The zircon was processed to acquire a precise measurement of the Parent and Daughter atoms locked within that mineral. You discover that there is a ratio of 15 Lead 207 atoms (207Pb) to 0.0667 Uranium 235 atoms (235U). How many half-lifes passed since that mineral formed? What is the age of the rock based on it's half-life? A. 4 Half-lifes/2.8 billion years old

B. 3 Half-lifes/2816 trillion years old

C. 3 Half-lifes/2816 billion years old

D. 2 Half-lifes/2.8 billion years old

E. 4 Half-lifes/2.8 million years old

F. 2 Half-lifes/2.8 million years old