Cartels, monopolies, trusts and horizontal and vertical integration all share the goal

Cartels, monopolies, trusts, and horizontal and vertical integration all share the goal of increasing profits. The step by the federal government to limit the power of corporations is the Sherman Antitrust Act. The argument that supports the perception of the big business leaders as "captains of industry" is that the support for technology benefits the economy.  

b.provides a written record of the transaction

i also think it is c