The correct answer to go in the blank would be letter choice C) Mixed or the third option because its true.
Do you have more information with the question?
The 1st commom man elected as the president was Andrew Jackson
Dachau was opened in March of 1933.
The separation of powers protects the people from the abuse of control from any of the three branches of the government - the answer is all three of them (the legislative, the judicial, and the executive).
any of the three branches could have the power of sabotaging the work of the other two, so the power of the three branches has to be restricted - they need to be checked by the other two branches.