What was the effect of business practices such as consolidation, creating trusts, and forming pools?

select one:
a. they increased public support for the company that appeared to be most successful.
b. they made it possible to be eligible for government support such as land grants and subsidies.
c. they reduced the significance of competitors so a company had more control over pricing and product.
d. they were required forms of management in order to sell shares of stock and raise funding for expansion.