Will recieve branliest!

which of the following is an example of evidence supporting the theory that volcanic eruptions caused the dinosaurs to become extinct?
a. massive lava flows in india date to the same time period.
b. a thin layer of rock containing iridium formed at that same time period.
c. many sea creatures became extinct at the same time as the dinosaurs.
d. volcanoes often form along boundaries between the sections of earth's crust called plates.