I need help with all three sections

In witch of these areas were the early bantu successful in part to there iron working skills ? check all that apply -agriculture -gathering -navigation -trade -warfare

When there are advances in technology, such as the personal computer, how might business productivity change? a) productivity is separate from technological advances so there is no impact. the new technology can replace outdated, less efficient, machinery. o) the businesses' products will no longer be demanded. d) manufactured items will be made elsewhere.

What battle in the civil war was known as the bloodiest war ?