What are the pieces of evidence used to support the theory that dinosaurs became extinct as a result of a comet impact about 65 million years ago? choose all that apply.
a) There is shocked quartz from this time.
b) There is a crater in Mexico that dates from this time.
c) There is a layer of soot that dates from this time, indicating widespread fires.
d) There are water layers in the deep ocean that show comet dust.
e) There is a layer of iridium (a rare metal) that coats the surface of Earth. The coating appears to have happened at this time.
f) A crater on the moon was found that matched a similar crater on Earth.
g) Iridium was found in trees of that age.
h) Cave paintings show evidence people of that time experienced the comet.