The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
What motivated the plotters to conspire against King James II was to overthrow the Catholic king and out a Protestant descendant on the throne of England.
We are talking about an event in British history called the Glorious Revolution.
King James II was a Catholic King, and British Protestant people tolerated him for a while, waiting for her daughter Mary to take the throne. But the unexpected happened in June 1688, the King had a son and he should be the one to inherit the throne of England.
That is when noble and wealthy Protestant English people decided to ask William of Orange to invade Britain and capture the King. And so it was, William and Mary(his wife) were crowned King and Queen of England in April 1689.