Secular education in the Middle Ages (note that "secularity" here is relative to Christian theocracy. ) including court education and knight education.

Religious education in the Middle Ages mainly refers to Christian education, and its institutions are mainly monastic schools. So don't choose a.

Knight education is a special family education. Mainly cultivate the chivalrous spirit and skills of being brave and chivalrous, loyal to the monarch and respecting the Lord. Its educational content is mainly the seven skills of chivalry: riding, swimming, throwing guns, fencing, hunting, playing chess and poetry. So he is not a simple military or cultural education. So don't choose c and d.

You can read Wu Shiying's History of Foreign Education.