Which would a historian use most often to research people or events from the past? a. old books and papers b. old buildings and ruins c. old tools and pottery shards

What notable contributions to science has sandia national labs (snl) produced over the years?

Experimented with communism before taking part in a number of civil rights and antiwar protest

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?