The answer is racial ....
When Cromwell said that the death of the king was a “cruel necessity” it can be inferred that he thought true freedom and change was not possible without violence.
They wanted to protect United states trading opportunities in China.
If your school is asking you this question, then they don’t believe in equality of thought. We are in a Republic, and equality has been achieved. If this answer is not accepted by your school, then I have nothing to say to your administration.