The answer to question 11 is B. Taxes Paid by Peasants to Lords.
The answer to question 12 is C. Forms of Military Technology.
Question 11 asks for the best title for the list of three items: "head money", "tallage", and "fee when a woman married". All three of these items are taxes that peasants paid to lords in the Middle Ages. Head money was a tax on each person in a household, tallage was a general tax that could be levied for any purpose, and the fee when a woman married was a tax that was paid by the groom to the lord of the bride's manor.
Question 12 asks for what the three items "stone wall", "castle moat", and "knight's armor" have in common. All three of these items are forms of military technology that were used in the Middle Ages. Stone walls were used to defend castles and towns, castle moats were used to deter attackers, and knight's armor was used to protect knights in battle.
Therefore, the answers to questions 11 and 12 are B. Taxes Paid by Peasants to Lords and C. Forms of Military Technology, respectively.