First one is phaseB. the other one is phaseA.
Because the slaves are what worked the economy, while everyone else did nothing. Without the slaves the entire thing would collapse because slave owners would not want to work.
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Answer: difficulty in matching qualified workers with available jobs.
Explanation: structural unemployment is a result of skill gap. Technological advancement is the major reason for structural unemployment because it makes the skills of many workers out of date. Further education and training to meet up with latest technlogical trends is the solution to structural unemployment.
Answer: Public service announcement.
Explanation:
A public service announcement is a message in the public interest that is disseminated without charge and with the aim of raising awareness, changing public attitudes and the behavior of people towards a social issue.
In the United Kingdom, public service announcement is called public information films. The common topics discussed in public service announcements are safety and health related topics such as issues relating to obesity, gambling etc.