The correct answer is C) They were jealous of the Spanish wealth.
The Netherlands were looting Spanish ships because they were jealous of the Spanish wealth.
The Dutch attacked many Spanish ships in the late 1500s. Spanish ships used to carry silver and gold from the Americas and were transported to Spain when they were intercepted by Dutch ships to robber the raw materials. The Dutch knew that the Spanish were its enemies and could get richer with the gold and silver. And of course, they wanted that richness for the Netherlands.