b) It allowed people who were not nobles or church officials to have decision-making power.
Explanation:
- After escaping from the captivity of Prince Edward, most of the nobility stood by his side and unitedly attacked Montfort.
- Montfort was defeated and killed in the battle of Evesham in 1265. Henry's authority was reinstated. Although he was not required by statute to do so, Henry convened the House of Commons twice between September 1268 and 1270.
- Montfort's decision to invite rites and citizens to Parliament marked the irreversible entry of the landlord's class into politics. Since then, it has been impossible for monarchs to turn their backs and ignore them - which explains Henry's decision to convene the House of Commons after 1265.
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