The most fitting answer to how the Commercial Revolution and its aspects facilitated human cruelty would be:
b European colonizers used the aspects of the Commercial Revolution to exploit Indigenous Americas and enslaved Africans in order to become richer.
This option specifically highlights the exploitation and mistreatment of Indigenous peoples and enslaved Africans, which were direct consequences of the economic motivations and practices that emerged during the Commercial Revolution, such as increased trade, colonization, and the transatlantic slave trade.