Answer:
A. control of a key resource
Step-by-step explanation:
The International Nickel Company of Canada was founded in the early 1900´s and it was the result of the merge of three companies, the Carnegie Steel Company, Canadian Copper Company and Orford Copper Company, this is very important because this three companies were merged into a single one that controlled the whole production of Nickel, so they basically created a monopoly by merging with eachother.