It is significant because it shows how vulnerable to attack the medieval people were and why the need for protection was so strong.
Laissez-faire, in the capitalist world this is an important doctrine that states that businesses should have the right to as they please with no government intervention. The doctrine promotes capitalism and business overall, in hopes to have a free economy.
Life: everyone is entitled to live.
Liberty: everyone is entitled to do anything they want to so long as it doesn't conflict with the first right.
Estate: everyone is entitled to own all they create or gain through gift or trade so long as it doesn't conflict with the first two rights.
I am pretty sure that the answer is D) Parliamentary Democracy. I know for sure Turkey's system of government is one of the two forms of a Democracy. Turkey's system of government is a Parliamentary Democracy with free market economy. One of the reason's I believe the answer is D is because, the info in your question has nothing about a Judicial Branch in Turkey's government or anything about voting for the Executive Branch.