The minimum age to become a SWAT team member typically varies by law enforcement agency, but most agencies require candidates to be at least 21 years old. However, if you have an associate degree, the age you can join the police force may vary, but generally, the minimum age is still around 21 once you apply. Given the options provided, none of them align with the common requirement for SWAT team members.
If you must choose from the options given and assuming the SWAT team follows standard law enforcement age requirements, the closest and most appropriate response would be 18, as that is often the minimum age to apply to become a police officer. However, keep in mind that you would still need to meet the age requirement of 21 to serve on a SWAT team.