The statement that best explains the development of constitutional monarchy in England is:
The idea that a monarch’s powers should not be absolute was first made law in the Magna Carta, and with the Glorious Revolution it became the basis of England’s monarchial system.
This choice highlights the key transition from absolute monarchy to a system where the powers of the monarch were limited by law, linking the historical significance of the Magna Carta to the later establishment of a constitutional monarchy following the Glorious Revolution.