Which of these sentences would work as the main idea for an article about famous lion tamers? 1 Elephant trainers were usually less famous to crowds than lion tamers and trapeze artists. 2Most famous lion tamers started their circus careers performing a less dangerous act. 3Lion tamers are not thinking of the lion's needs when they force them to perform for roaring crowds. 4Lion taming was not a common circus act until sometime in the twentieth century.