The use of pools and holding companies benefited which of these groups during the late 19th century and early 20th century?

The use of pools and holding companies benefited the following group during the late 19th and early 20th century:

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

a, he promoted disarmament