[单项选择]Bernard Bailyn has recently reinterpreted the early history of the United States by applying new social research findings on the experiences of European migrants. In his reinterpretation, migration becomes the organizing principle for rewriting the history of reindustrialize North America. His approach rests on four separate propositions.
The first of these asserts that residents of early modern England moved regularly about their countryside; migrating to the New World was simply a natural spillover. Although at first the colonies held little positive attraction for the English—they would rather have stayed home—by the eighteenth century people increasingly migrated to America because they regarded it as the land of opportunity. Secondly Bailyn holds that, contrary to the notion that used to flourish in America history textbooks, there was never a typical New World community. For example, the economic and demographic character of early New England towns varied considerably.

A. Migrants who came to the colonies as indentured servants were more successful at making a livelihood than were farmers and artisans.
B. A large percentage of migrants to colonial North America came as indentured servants than as free agents interested in acquiring land.
C. By the l730’s, migrants already skilled in a trade were in more demand by American employers than were unskilled laborers.
D. Migrants to colonial North America were more successful at acquiring their own land during the eighteenth century than during the seventeenth century.