单选题 What conclusion can be drawn from the essay about the United States during the time of Henry Ford's youth?

A、 Horse-drawn carriages were used as a popular means of transportation.
B、 Most people were tired of horse-drawn carriages and wanted a better way to travel.
C、 the assembly line made it more difficult for people to invent new products.
D、 Many inventors were trying to invent a fast and comfortable way to travel.

【正确答案】 A

【答案解析】第3段写到儿时的Henry和父亲一起坐马车出行，所以推断美国当时普遍的交通工具是马车，A正确。B，C，D文中都没有提及。