The answer you are looking for is B.Oil
In pre-modern societies, status differentiation is widely varied. In some cases it can be quite rigid and class based, such as with the Indian caste<span> system. </span><span>In contrast to modern societies, a person’s lifelong position in most premodern societies was mostly determined by the caste he/she belongs.</span>
He used the profit he made as an investment, and in this way his fortune grew ever bigger and bigger. If ever there was a profit, he would not spend it, but use to expand the current business, or if this way not optimal, to buy new businesses and assets.
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There's a bunch of popular hats around the world so it depends :D
Only thing I can think of is ivory. They do produce it, it is exported but that's illegal...
