Question: In a use case diagram, a ( n ) might be a customer, a student, an employee, even an external system ( such as PayPal

In a use case diagram, a(n) might be a customer, a student, an employee, even an external system (such as PayPal or a bank).
a. Entity
b. Actor
c. User
d. None of the above
In a use case diagram, a(n) might be a customer, a

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