You are a Central Asian nomad. You and your family are migrating westward, and have just wiped out a farming village. You are wondering how you can carry some of the riches from the raid, since the horses already have too much to carry. You watch your daughter play with a small toy which has two little wheels made from dried, twisted grass. Suddenly you jump up and shout the Central Asian equivalent of "Eureka!" and within several days have rigged up a crude two-wheeled cart which can be pulled by a horse. You have produced a/an:__________

a. primary innovation
b. secondary innovation
c. example of acculturation
d. example of applied anthropology
e. syncretism