What was the main reason for the failure of Charles I's personal rule?

How to answer this type of question: To assess why Charles I's personal rule failed, you must set a criteria and a few factors which you will expand on throughout the essay. Considering the harsh time limit on each essay in the real exam, it would be sensible to pick out 3 main factors, such as financial problems, Laudian reforms and Charles' actions. The criteria, which you will need to establish in the introduction in order to get into the top band, could be to assess the impact of each factor on undermining Charles' personal rule. You must also reach a final judgement in your introduction on what you believe to be the main reason for the failure of Charles I's personal rule and give a very brief summary why. This is key to making a sustained argument in your essay and will definitely be praised by your examiner. After writing the introduction, you must develop on the 3 main factors you mentioned. Make sure to write topic sentences that help sustain your argument and to not contradict yourself. For example: 'The main reason for the failure of Charles I's personal rule was his actions, as his imposition of Arminianism in Scotland led to an organised opposition undermining his power....To a lesser extent, financial problems undermined Charles' personal rule'. After writing the topic sentence, make sure to support this with concise evidence. Avoid narrating simply what happened and use the evidence to directly support your assertion. To get into the top band, you need to evaluate your argument via your criteria, revealing how this factor may not primarily be the main reason for the failure of Charles I's personal rule. Remember to sustain your argument even throughout the evaluation. Finally, in the conclusion, you need to assert your final judgement on the question and refer to the previously established criteria on why your chosen factor, out of all the other factors, is why Charles' personal rule failed.