What kinds of business practices caused some railroad owners to be accused of being "robber barons" ?

Ineed a summary over thurgood marshall ! me

An alliance of two political parties is know as? a. majority b. coalition c. candidate d. government

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 the new technology can replace outdated, less efficient, machinery.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