What was the policy of vietnamization?

a. south vietnam joined with north vientnam to create a unified country
b. south vietnam’s held free elections to establish its own government
c. south vietnam took on a greater military role in the conflict.
d. south vietnam began a serious of attacks against cambodian communists

Two gymnastics teams are intense rivals. the first team has started recruiting new gymnasts from different cities and even foreign countries in an effort to build a stronger team. after learning this, the second team begins its own recruitment campaign to find even better gymnasts. over a period of months, each team recruits dozens of players, each time trying to find a better recruit than its rival's most recent addition. which idea from the cold war is most similar to this scenario?