The most accurate response is:
The Kingdom of Kongo lost control of the slave trade, while the Swahili coast lost its power to extract resources.
In the seventeenth century, the Kingdom of Kongo experienced significant disruption as the demand for slaves grew in the Americas and the Portuguese influence led to internal conflicts, diminishing the kingdom's power and control over trade. Conversely, the Swahili coast was affected by an increasing Portuguese presence that undermined traditional trade networks and the region's economic power. Ultimately, both regions faced challenges that altered their positions within the global trade system.