correct option 1:
correct option 2:
The correct answer is The takeCourse method might never complete. Note that it may seem that The study method always has an infinite loop is also somewhat (?) correct, but it actually isn't for two reasons: (1) it is NOT expressed in the diagram that the two methods never complete there may be a termination condition given this graph; (2) there is no indication in the graph that the study method has a loop at all.