Respuesta :
Based on the way the instructor sets tests, we can infer that the instructor uses a B. variable-interval schedule
A variable-interval schedule:
- Means that the time taken between tests changes
- Means that there is no set time the test will be taken
The instructor is therefore operating on a variable interval where the students do not know when the tests will come which will force them to always be prepared.
In conclusion, this is a variable interval.
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