Final answer:
In the state of Kansas, if you are below the age of 21, your BAC must be below 0.02% in order to legally drive.
Step-by-step explanation:
The state of Kansas has a legal blood alcohol concentration (BAC) limit of 0.02% for drivers under the age of 21. This means that if you are below the age of 21 in Kansas, your BAC must be below 0.02% in order to legally drive. It's important to note that this limit is lower than the standard limit of 0.08% for drivers who are 21 and older.