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 response accurately captures the evolution of the monarchy in England, highlighting the significant role of the Magna Carta in limiting the king's power and the subsequent developments leading to the establishment of a constitutional monarchy after the Glorious Revolution.