B. the United States became the world leader in steel production.
because people might decide to shift to non-electric razors to save money.
Answer:
40%
Explanation:
Immigration into the United States saw its peak in the twentieth century. In 1907, European immigration got to its peak with about 1.3 million people who entered the country. In 1910, there were 13.5 million immigrants who were resident in the United States. This represented 40 percent of all the people living in the United States that were either born in the States or had a parent or foreign-born parent.