Which of the following was not a factor that made African slavery appealing to English planters in the New World?
a. Since slaves' terms of service never expired, unlike those of indentured servants, Africans could create a permanent labor force.
b. Europeans believed that Africans were more accustomed to hard agricultural labor than were Native Americans, and thus would be better workers.
c. Africans had long since developed a resistance to European diseases, making epidemics less likely than among Native American laborers.
d. Africans could not claim the protection of English common law.
e. A long English legal tradition of discriminating against dark-skinned peoples eased the legalization of slavery.