By the 1960s much of the commerce of West Africa moved in "mammy wagons" trucks owned by
who

Female Entrepreneurs

Explanation:

Mammy wagons or Mammy trucks as they were known, were very instrumental in the growth of trade in West Africa in colonial times with them being especially popular in Ghana and Nigeria. Because of the space and the speed they provided, farmers and traders used them to transport wares for sales across towns, cities and countries.

At the heart of this were female traders who for a long time had been the driving force for trade in the region. They used these wagons to gain access to markets both locally and regionally, using the logistical advantage of the wagons to gain control of routes and markets and expanding their output past even national boundaries.

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explanation: