Which of the following tools is more useful for learning about prehistory than for learning about history? a. c-14 datingb. secondary sourcesc. diariesd. newspaper articles

The correct answer is A. C-14 Dating

Explanation

History is the science that studies the facts of humanity's past period from the first record of writing systems to the present. On the other hand, prehistory is the period from the appearance of the first hominid until the emergence of writing. In spite of the above, it is history as a science the one that is responsible for studying everything that happened in the past. Additionally, for the investigation of prehistory, scientists have used mainly the carbon-14 (C-14 Dating) method that allows them to know the age of some objects found around the world, while for the period considered history, texts of all kinds have been taken to study civilizations and humanity. Because in these events from history but not from prehistory are recorded. So, the correct answer is A. C-14 Dating

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.