Answer:
a. an intelligent tutoring system.
Step-by-step explanation:
Intelligent tutoring system: The term "intelligent tutoring system" is defined as one of the "computer systems" that is focused on providing customized and immediate feedback or instruction to various learners and is generally completed in the absence of any requirement of intervention form any of the human teacher or professor.
In the question above, Mr Armus has developed and is using an intelligent tutoring system.