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Macduff
is primarily motivated by his love for his country. Macduff wen to England to
gather ally with the King of England and Malcolm (Duncan's son) in overthrowing
Macbeth even if this meant that his family will be killed by Macbeth.
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Answer:variable - interval
Explanation: In the this scenario, The humanities instructor is using a variable-interval schedule of reinforcement. The instructor used the word 'surprise' meaning the time and date of the test isn't fixed and the quizzes will come up at unpredictable time intervals. This kind of reinforcement results in a steady response rate as it keeps students on their toes simply due to the fact that they have no idea of when the quizzes are coming up.
