Examlex
Which of the following is a naturally occurring form of calcium carbonate?
Abraham Lincoln
The 16th president of the United States, who served during the Civil War and is remembered for abolishing slavery.
Robert Fulton
An American engineer and inventor credited with developing the first commercially successful steamboat in the early 19th century, significantly impacting transportation.
Steamboats
Paddlewheelers that could travel both up- and downriver in deep or shallow waters; they became commercially viable early in the nineteenth century and soon developed into America’s first inland freight and passenger service network.
Upstream Commerce
The activities involved in the sourcing and procurement processes before goods reach the retailer or final consumer.
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