Plz Help Quick Canada and the United States both have

A economic barriers that severely limit the importing of products from Mexico.

B separatist movements among their French-speaking people.

C major ports on both the Atlantic and Pacific coasts.

D superpower status in the world at large.

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.