two possible causes of k t mass extinction

try to finish what im wirting

requirement:

write an extended paper of 1000-1200 words examining two different theories on the possible causes of the Cretaceous-Tertiary (K-T) mass extinction.

Address interpretation of geologic records and how that affects the theories.

In the paper includes a brief summary ( https://science.sciencemag.org/content/208/4448/10… ) about one of the mass extinction theories using an article from a reliable source.