King John was unpopular because he refused to fight England’s enemies in France. Option B is correct.
King John was also unpopulat due to the fact that he taxed people heavily and put them in jail for no reason. Furthermore, he murdered his nephew and he did not get along well with the people of England. John, also known as John Lackland, was King of England from 1199 until his death in 1216. Besides, he lost many of his kingdom's French possessions and was forced to seal Magna Carta in 1215.