Ruled by King or queen so it's b and I got it wrong thxs to Mr . Mexican
<span>Rockefeller used the size of his company Standard Oil to negotiate preferential rates with railroad companies to transfer his oil in the refinement process. By gaining the upper hand in transportation costs, he was able to horizontally integrate his competitors into his firm working to establish a monopoly in the American oil industry. </span>
The correct answer is Moscow.
Each of the described can be found in Moscow, Russia.
The fertile river Valley between the Tigris and Eufrades rivers if that what you mean.
