Which of the following is a requirement for community interpreters in the U.S.?

Being over 18 years old is a requirement for community interpreters in the U.S. This age requirement is in place to ensure that interpreters can legally enter into contracts and provide services without the constraints that might apply to minors. Additionally, this ensures that interpreters possess the necessary maturity and responsibility to handle the complexities and sensitivities of interpreting in various community settings.

The other options, while they may be beneficial in certain contexts or specific settings, are not universally required for all community interpreters. For instance, while higher education can enhance an interpreter’s skills, a bachelor's degree is not mandated across the board. Similarly, while previous work experience can be valuable, it is not a general requirement. Proficiency in only one language would not suffice for a role that requires interpreting between different languages, as the essence of community interpreting is the ability to facilitate communication across language barriers.