In what way did the court broaden the meaning of the word commerce in the northern securities case?

The thing or the way that the court broaden the meaning of the word commerce in the northern securities case is that the Northern Securities Case broadened the meaning of commerce showing that commerce extends to the regulation of the ownership of stock. The answer in this question or the way that the court broaden the word commerce is to show that commerce extends to the regulation of the ownership of stock.

Im pretty sure the answer is d.) is more densely populated.