What were the primary uses of the horse for early man

A．The early horse were larger than the more modern breeds.
B．The only true wild horses left in the 20th century are in the Middle East.
C．The oldest breed of the modern horses is said to be the Arabian.
D．Medieval Knights preferred fast, active horse.

A．it's mere(只不过的)fuss(小题大做)to write so much about the ideas, feelings, and actions of youth
B．the author blames the young for being trouble-maker at home
C．the author blames the parents for not understanding what their children think and feel
D．the trouble in American families is often caused by difference ideas and opinions between parents and children