Scientists observing rock layers at a dig site in New Mexico find one thin layer at the boundary between the Cretaceous and Paleogene periods. The layer has a large amount of the element iridium, which is not commonly found on Earth. The layer also contains quartz crystals with a pattern indicating high pressure and intense heat. Similar iridium-rich layers are found around the world, and at the iridium layer, many diverse fossils are found. The rock layer findings in New Mexico and around the world support which explanation about the end of the Cretaceous period?
I will mark you brainliest if i get the correct answer

A. Earth produced a large amount of iridium at the end of the Cretaceous period, which poisoned all prehistoric life.

B. A large meteorite struck Earth, depositing the iridium worldwide, and caused a major extinction event of prehistoric life.

C. Prehistoric life was attracted to iridium, and populations gathered in areas with large iridium deposits.

D. Prehistoric life produced iridium during fossilization, and large gatherings of organisms created pressure and heat on buried rocks.