I think your answer is A)
The Anglo-Spanish War<span> broke out in 1585, following the seizure of English merchant ships in </span>Spanish<span> harbors. ... In August, England joined the Eighty Years'</span>War<span> on the side of the Dutch Protestant United Provinces, who had declared their independence from Spain.</span>
Answer:
<em>He realized that slavery could cause the nation to split apart.</em>
Explanation: