Please help with this i dont understand

Once the plague became airborne, how could it then be spread?

Why is ivan iv known as “ivan the terrible”?

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 the new technology can replace outdated, less efficient, machinery.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.