Which of the following individuals was an immigrant from Germany?

Levi Strauss was indeed an immigrant from Germany, which makes this the correct choice. He was born in Bavaria, Germany, in 1829 and emigrated to the United States in 1847. Strauss is best known for founding the first company to mass-produce blue jeans, which began during the California Gold Rush. His contributions to both the clothing industry and the economic landscape of California have had a lasting impact, particularly in relation to the development of the state's garment industry.

Cesar Chavez, although a significant figure in labor rights and agricultural reform, was born in Arizona to Mexican immigrant parents, not Germany. James Marshall is known for discovering gold at Sutter's Mill in California, which sparked the Gold Rush, but he was born in New Jersey and had no German immigrant background. Rodney King was an African American man whose experience became emblematic of racial tensions in Los Angeles, particularly following the 1992 riots, but he did not have ties to German immigration. This context clarifies why Levi Strauss stands out as the German immigrant among the individuals listed.