What are the qualifications to be governor in the United States?

To serve as governor in the United States, common qualifications typically include being at least 30 years old, being a U.S. citizen, and being a resident of the state for a designated period, which varies by state but is often around 5 years. The correct option highlights that a candidate must be at least 30 years old and have been a registered voter for 5 years, aligning well with the general expectations for gubernatorial candidates.

This option emphasizes the age requirement and the necessity of civic engagement through voter registration, which are crucial for ensuring that a governor is both experienced and connected to the state's electorate. However, specifics can differ widely across states, with some having additional requirements regarding residency duration or other qualifications, but the foundational age and citizenship criteria remain consistent across the country.

Other options introduce elements that don't typically correlate with a required gubernatorial background, such as mandatory legal training or military experience, which are not prerequisites in most states, indicating a broader range of acceptable backgrounds for governors.