"Anyone from Muslim community interpret the Qur'an and laws and lead the daily prayer"
Among the choices presented, it is the statement above that best reflects or describes the philosophy of Sunni. It says everybody in the Muslim community is well-versed of the laws of Qur'an and can do the daily prayers as instructed by the teachings.
Answer to question 1:
The "Dark Ages" is a historical periodization traditionally referring to the Middle Ages (c. 5th–15th century) that asserts that a demographic, cultural, and economic deterioration occurred in Western Europe following the decline of the Roman Empire.
Answer to question 3:
Chivalry has changed quite a bit since it appeared in the middle ages. ... In social situations, chivalry is still acceptable. That said, I think it comes down to men and women being courteous to each other rather than men being the only ones practicing courteous acts. A woman should hold the door open for men and women.
I know its not the full answers but this is the best I can do based on the questions.