I'm not sure about this

when the constitution was first ratified, only white men of a certain age were considered citizens. later amendments to the constitution have affected americans' participation in government. amendment 15 was a result of

society changing to include women as citizens
society changing to include men of all races as citizens
the abolishment of slavery in the united states
the outcome of the union winning the civil war

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?