The most important difference between the truman doctrine and the eisenhower doctrine demonstrated that
a. the united states wanted to increase economic aid to communist nations in eastern europe.
b. the policies of the united states had been successful in halting the spread of communism.
c. the united states later thought that military aid was needed in its fight against the spread of communism.
d. it was no longer necessary for the united states to send economic aid to countries threatened by communism.

c. the United States later thought that military aid was needed in its fight against the spread of communism.

Explanation:

The Truman Doctrine (1947) was a messure created by the U.S. for supporting free people who were resisting the atempts of armed minoritys or external pressures. These regimes were a threat to capitalism so the Truman Doctrine was created to fight against sovietic and comunist influence.

The Eisenhower Doctrine (1954) was a geo-strategic militar doctrine and a nuclear strategy by which if a Middle Eastern country was being threatened by armed aggression, it could request American economic assistance or aid from U.S. military forces.

C

Explanation:

1. state-issued photo ids. provide them for free for those who can't afford them.

2. the system we have seems to be working nearly perfectly. seems like about 31 cases per billion votes cast

3. the national policy for hiring new employees which requires proof of eligibility to work. there are something like 20 types of identification which can be used for this.