Which action taken by president nixon increased opposition to the vietnam war in the united states?
a. bombing of cambodia
b. failing to use henry kissinger effectivelt
c. giving up south vietnam
d. increasing troop levels

a. Bombing of Cambodia

Details:

In 1969, President Nixon authorized bombing raids in Cambodia.  Then, beginning in April, 1970, Nixon ordered a ground attack on Vietcong bases in Cambodia.

Pres. Nixon believed attacking in Cambodia was necessary to forestall communist forces from attacking South Vietnam from that direction. But his decision was hugely unpopular with the American public, which did not want further escalation of the war.  This was seen as essentially an invasion of Cambodia by the US.   A key example of protests were those that occurred at Kent State University in Ohio, in May, 1970, in response to Nixon's Cambodia campaign.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

the influence of charles louis de secondant , baton montesquieu.