At what age can a driver obtain a commercial driver license (CDL) in Florida?
Answer: B — 21 years old
A driver can obtain a commercial driver license (CDL) in Florida at the age of 21. This is due to the fact that the minimum age requirement for obtaining a CDL in Florida is 21 years old. Options A and C are incorrect because they state an age that is either too young or too old to obtain a CDL in Florida. Option D is also incorrect as it exceeds the minimum age requirement. Therefore, option B is the only correct answer.