Final answer:
Most indigenous Americans acquire U.S. citizenship through birthright and automatic citizenship by being born to U.S. citizen parents or born within the United States.
Step-by-step explanation:
Most indigenous Americans acquire U.S. citizenship through a. Birth. Children born abroad to a U.S. citizen are automatically considered U.S. citizens. Additionally, native-born individuals are granted citizenship by being born within the United States, including those born to alien parents.
It is important to note that some states in the past had different requirements for citizenship, such as property ownership or religious qualifications. Native Americans were not recognized as citizens until the Indian Citizenship Act was passed in 1924.
Overall, the most common way for indigenous Americans to acquire U.S. citizenship is through birthright and automatic citizenship if they are born to U.S. citizen parents or born within the United States.