The workers are specialized if they perform only smaller tasks and if they become better and better at these tasks - "specialists". This means that the whole process is divided into smaller takss that the workers can specialize in.
Therefore the correct answer is
D. dividing labor into smaller specific tasks
Well, the gangs go up to each udder and try to defeet da poleece. u know wat ime sayin? my gang be hype up in dis club. WE be runnin from dem cops like thare waz no tomorroe yo!