Final answer:
The eighteenth century was not the height of the Atlantic slave trade dominated by Spanish merchants and ships. The British were the primary carriers of Africans to the New World during this time.
Step-by-step explanation:
The statement in the question, 'The eighteenth century was the height of the Atlantic slave trade, a commerce increasingly dominated by Spanish merchants and ships,' is false.
The eighteenth century marked a significant increase in the trans-Saharan trade network, with African states engaging in warfare and increasing the trade of enslaved captives. However, the primary carriers of Africans to the New World during this time were the British, not the Spanish.
The Portuguese dominated the transatlantic African slave trade for the first 130 years, but after 1651, the British became the primary carriers until the trade's end in the early nineteenth century.