I believe the answer is: It was weakened and could not provide military protection.
Land reclamation refers to the process of creating new land by elevating the land that covered by the sea or lake and extracting the water out.
Due to the large budget for this project, the government have less money to be allocated for military supplies and soldiers.
Who wished to separate from the perceived corruption of the Church
One reason ^
The oversight function is one of the checks the legislative
branch holds over the executive branch.
The Nicene Creed is a "symbol" of Christian belief in all regions and all denominations.
It ultimately explains the Church's teachings about the Trinity and also affirms the historical realities of the life of Jesus Christ. It is based on biblical concepts and truths though it does not directly quote the Scripture.
The Ancient Nicene Creed was accepted by the Catholics, Orthodox, and many Protestants. The Creed was written in AD 325, defined by Church Bishops at the Councils of Nicaea, and was completed in its present form in AD 381, added on by Constantinople.
D is the answer for this question as it is the most likely.