The substance temperature decreases because the internal heat (that change temperature) is caused by the particles movement. The correlation is this: the more movement, higher temperature; the less movement, lower temperature.
So, decreasing kinetic energy will have a result with less movement, which implies lower temperature.
The correct answer is that Charles I was tried and executed.
After Oliver Cromwell brought the English Civil War to a close and installed the Protectorate with the signed Instrument of Government, Charles I was tried and executed.