Respuesta :
The answer is letter D. Certification programs are available at online schools, vocational schools and community colleges. It also defines as trade certification or a professional designation and is a designation earned by anyone to guarantee qualifications to perform a task or a job.
There is actually another of this same question on Apex, which has all of those but Four-Year. Just to make sure there isn't to much confusion its:
Certification Programs are offered by all of the following except:
A. Community colleges
B. Vocational schools
C. Online Educators
D. Liberal Arts colleges
If its this variation, then its Liberal Arts Colleges.
Confirmed doing it myself on apex, so I tried to help clear it up since they tend to change answers sometimes. :D