The meaning behind that simile is that ‘they’ are getting tons of gold like they were corn grains which if you’ve seen them, there’s a lot in just one corn. So basically those people were getting a lot of gold.
I say it is probably b because law is a list of rules to go by ladder don’t really know but pretty sure it doesn’t mean that I’m assuming it is b because we learned that a long time ago but don’t know if it the same meaning for you
Here, We need to Organize the information of our research so, we should classify them into categories.
In short, Your Answer would be Option B
Hope this helps!