D. His method for producing steel in large quantities allowed it to be used on a massive scale.
Explanation:
Sir Charles William Siemens built up his regenerative furnace during the 1850s, for which he asserted in 1857 to ready to recuperate enough warmth to spare 70–80% of the fuel. The furnace worked at a high temperature by utilizing regenerative preheating of fuel and air for combustion. Through this strategy, an open-hearth furnace can achieve temperatures sufficiently high to melt steel.
with a resource such as grain that was very common in egypt, trading it for resources not as common opens doors for bigger trading and more market. Wood became widely available and grain became available to others who traded in wood for it.
